iMac 2017 27" chrome/firefox video stuttering

Question

Hi there,I just bought a 5k iMac 2017 model 27 inch with i5 3,8 ghz, 24gigs of ram and radeon 580 8gb vram, a fairly quick machine BUT I have some serious issues regarding video playback on various web streaming services such as Youtube and d Vimeo. Tested on Sierra and High SierraThe issue is that playing 4k videos on either of these platform I notice a big stuttering and a less one but noticeable too  while I&#x27;m watching even 1080p videos. Only safari is smooth but safari only supports 1080p.I tried pram reset but nothing. Also Apple service said that there is no hardware issue but I cannot agree with that.Does anyone experience the same issues? Any suggestions?

CountryGirl56 · Answer

You&#x27;re welcome. Are you connected by WiFi or Ethernet? You might want to test your actual connection speed. You can use speedtest.net or speedof.me or your ISP&#x27;s speed test if they offer one. How many devices are connected also has an influence. And, as I mentioned, if you happen to be viewing videos many others are watching, Then there are browser extensions, anti-virus programs etc.

CountryGirl56 · Answer

I don&#x27;t see anything too unusual except the "Microsoft Microsoft Nano Transceiver 1.1" which seems very old.The other thing is you have third party RAM installed which if out of spec could cause a problem. If you still have the original Apple RAM I would try testing just with it installed.

CountryGirl56 · Answer

Please install EtreCheck and post the report.http://etrecheck.com/

dionysiosfromamaliada · Answer

EtreCheck version: 3.4.7 (461)Report generated 2018-02-13 04:03:41Download EtreCheck from https://etrecheck.comRuntime: 1:43Performance: ExcellentClick the [Lookup] links for more information from Apple Support Communities.Click the [Details] links for more information about that line.Ignore expected failures in Apple tasks: DisabledHide Apple tasks: DisabledProblem: Other problemHardware Information: ⓘ    iMac (Retina 5K, 27-inch, 2017)     [Technical Specifications] - [User Guide] - [Warranty &amp; Service]    iMac - model: iMac18,3    1 3,8 GHz Intel Core i5 (i5-7600K) CPU: 4-core    24 GB RAM Upgradeable - [Instructions]        BANK 0/DIMM0            4 GB DDR4 2400 MHz ok        BANK 0/DIMM1            8 GB DDR4 2400 MHz ok        BANK 1/DIMM0            4 GB DDR4 2400 MHz ok        BANK 1/DIMM1            8 GB DDR4 2400 MHz ok    Handoff/Airdrop2: supported    Wireless:  en1: 802.11 a/b/g/n/acVideo Information: ⓘ    Radeon Pro 580 - VRAM: 8 GB        iMac 5120 x 2880Disk Information: ⓘ    APPLE SSD SM0512L disk0: (500,28 GB) (Solid State - TRIM: Yes)        (disk0s1) &lt;not mounted&gt;  [EFI]: 315 MB        (disk0s2) &lt;not mounted&gt;  [APFS Container]: 499.96 GBUSB Information: ⓘ     USB30Bus         Kingston DataTraveler 3.0             DataTraveler 3.0 disk2: (15,55 GB)                (disk2s1) &lt;not mounted&gt; : 210 MB                Install macOS High Sierra (disk2s2 - Journaled HFS+) /Volumes/Install macOS High Sierra : 15.21 GB (9.94 GB free)        Broadcom Corp. Bluetooth USB Host Controller         Apple Inc. FaceTime HD Camera (Built-in)         Microsoft Microsoft Nano Transceiver 1.1      USB31Bus Thunderbolt Information: ⓘ    Apple Inc. thunderbolt_busVirtual disks: ⓘ    Macintosh HD (disk1s1 - APFS) /  [Startup]: 499.96 GB (475.02 GB free)        Physical disk: disk0s2 499.96 GB (475.02 GB free)    (disk1s2) &lt;not mounted&gt;  [Preboot]: 499.96 GB        Physical disk: disk0s2 499.96 GB     (disk1s3) &lt;not mounted&gt;  [Recovery]: 499.96 GB        Physical disk: disk0s2 499.96 GB     (disk1s4) /private/var/vm  [VM]: 499.96 GB        Physical disk: disk0s2 499.96 GB System Software: ⓘ    macOS High Sierra  10.13.3 (17D47) - Time since boot: about one hourGatekeeper: ⓘ    Mac App Store and identified developersSystem Launch Agents: ⓘ    [loaded]    com.apple.AOSHeartbeat.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.AOSPushRelay.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.AccessibilityVisualsAgent.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.AddressBook.AssistantService.plist (Apple, Inc. - 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installed 2018-01-19)    [running]    com.apple.sharingd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.siriknowledged.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.soagent.plist (Apple, Inc. - installed 2018-02-13)    [running]    com.apple.softwareupdate_notify_agent.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.speech.speechdatainstallerd.plist (Apple, Inc. - installed 2018-02-13)    [running]    com.apple.speech.speechsynthesisd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.speech.synthesisserver.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.spindump_agent.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.storeaccountd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.storeassetd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storedownloadd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storeinstallagent.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.storelegacy.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storeuid.plist (Apple, Inc. - installed 2018-02-13)    [running]    com.apple.suggestd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.swcd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.syncdefaultsd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.syncservices.SyncServer.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.syncservices.uihandler.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.sysdiagnose_agent.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.systemprofiler.plist (Apple, Inc. - installed 2018-02-13)    [running]    com.apple.talagent.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.tccd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.telephonyutilities.callservicesd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.thermaltrap.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.tiswitcher.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.touristd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.trustd.agent.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.universalaccessAuthWarn.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.universalaccessHUD.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.universalaccesscontrol.plist (Apple, Inc. - installed 2018-02-13)    [running]    com.apple.universalaccessd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.unmountassistant.useragent.plist (Apple, Inc. - installed 2018-02-13)    [running]    com.apple.usernoted.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.videosubscriptionsd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.warmd_agent.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.webinspectord.plist (Apple, Inc. - installed 2018-02-12)    [running]    com.apple.wifi.WiFiAgent.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.xpc.loginitemregisterd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.xpc.otherbsd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.openssh.ssh-agent.plist (Apple, Inc. - installed 2018-01-19)System Launch Daemons: ⓘ    [not loaded]    bootps.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.AirPlayXPCHelper.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.AppleFileServer.plist (Apple, Inc. - installed 2018-02-12)    [loaded]    com.apple.AssetCache.builtin.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.AssetCacheLocatorService.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.AssetCacheManagerService.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.AssetCacheTetheratorService.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.CommCenterRootHelper.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.CoreAuthentication.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.CoreRAID.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.CrashReporterSupportHelper.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.CryptoTokenKit.ahp.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.DataDetectorsSourceAccess.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.DesktopServicesHelper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.DumpGPURestart.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.DumpPanic.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.FileCoordination.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.FontWorker.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.GSSCred.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.GameController.gamecontrollerd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.IFCStart.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.IOAccelMemoryInfoCollector.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.IOBluetoothUSBDFU.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.InstallerDiagnostics.installerdiagd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.InstallerDiagnostics.installerdiagwatcher.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.InstallerProgress.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.Kerberos.digest-service.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.Kerberos.kadmind.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.Kerberos.kcm.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.Kerberos.kdc.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.Kerberos.kpasswdd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.KernelEventAgent.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.MRTd.plist (Apple, Inc. - installed 2018-02-12)    [loaded]    com.apple.ManagedClient.cloudconfigurationd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.ManagedClient.enroll.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.ManagedClient.plist (Apple, Inc. - installed 2018-02-13)    [not loaded]    com.apple.ManagedClient.startup.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.MobileAccessoryUpdater.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.MobileFileIntegrity.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.NetBootClientStatus.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.NetworkLinkConditioner.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.NetworkSharing.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.ODSAgent.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.PCIELaneConfigTool.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.PasswordService.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.ProcessPanicReport.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.RFBEventHelper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.RemoteDesktop.PrivilegeProxy.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.ReportCrash.Root.Self.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.ReportCrash.Root.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.ReportPanicService.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.SCHelper.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.SubmitDiagInfo.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.TrustEvaluationAgent.system.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.UserEventAgent-System.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.UserNotificationCenter.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.WindowServer.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.WirelessRadioManager-osx.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.accessoryd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.adid.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.afpfs_afpLoad.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.afpfs_checkafp.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.airport.wps.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.airportd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.akd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.alf.agent.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.analyticsd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.apfsd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.appleseed.fbahelperd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.applessdstatistics.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.apsd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.aslmanager.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.atrun.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.audio.AudioComponentRegistrar.daemon.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.audio.coreaudiod.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.audio.systemsoundserverd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.auditd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.autofsd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.automountd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.avbdeviced.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.awacsd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.awdd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.backupd-helper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.backupd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.biokitaggdd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.biometrickitd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.bluetoothReporter.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.bluetoothaudiod.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.bluetoothd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.bnepd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.bootinstalld.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.bridgeOSUpdateProxy.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.bsd.dirhelper.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.captiveagent.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.cfnetwork.cfnetworkagent.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.cfprefsd.xpc.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.cmio.AVCAssistant.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.cmio.AppleCameraAssistant.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.cmio.IIDCVideoAssistant.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.cmio.VDCAssistant.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.cmio.iOSScreenCaptureAssistant.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.colorsync.displayservices.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.colorsyncd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.commerced.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.comsat.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.configd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.configureLocalKDC.plist (Shell Script fdaa81a4 - installed 2017-07-16)    [running]    com.apple.corebrightnessd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.corecaptured.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.coreduetd.osx.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.coreservices.appleevents.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.coreservices.appleid.passwordcheck.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.coreservices.launchservicesd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.coreservices.sharedfilelistd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.coreservicesd.plist (Apple, Inc. - installed 2018-02-12)    [loaded]    com.apple.corestorage.corestoraged.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.corestorage.corestoragehelperd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.coresymbolicationd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.csrutil.report.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.ctkd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.cvmsServ.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.dasd-OSX.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.defragx.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.diagnosticd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.diagnosticextensions.osx.bluetooth.helper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.diagnosticextensions.osx.getmobilityinfo.helper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.diagnosticextensions.osx.spotlight.helper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.diagnosticextensions.osx.timemachine.helper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.diagnosticextensions.osx.wifi.helper.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.diskarbitrationd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.diskmanagementd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.diskmanagementstartup.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.displaypolicyd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.distnoted.xpc.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.dmd.daemon.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.dnsextd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.dpaudiothru.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.dpd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.dprivacyd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.driver.eficheck.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.driver.ethcheck.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.dspluginhelperd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.dvdplayback.setregion.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.dynamic_pager.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.eapolcfg_auth.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.efilogin-helper.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.emlog.plist (Shell Script 24984d78 - installed 2017-07-16)    [loaded]    com.apple.emond.aslmanager.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.emond.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.eoshostd.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.eppc.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.familycontrols.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.findmymac.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.findmymacmessenger.plist (Apple, Inc. - installed 2018-02-13)    [not loaded]    com.apple.firmwaresyncd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.fontd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.fontmover.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.fpsd.plist (Apple, Inc. - installed 2018-01-23)    [running]    com.apple.fseventsd.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.ftp-proxy.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.getty.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.gkreport.plist (Shell Script 602379f1 - installed 2017-10-03)    [loaded]    com.apple.gssd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.hdiejectd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.hidd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.icloud.findmydeviced.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.iconservices.iconservicesagent.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.iconservices.iconservicesd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.ifdreader.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.installandsetup.systemmigrationd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.installd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.ionodecache.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.jetsamproperties.Mac.plist (? e4a95eb0 ? - installed 2017-11-10)    [loaded]    com.apple.kcproxy.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.kdumpd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.kextd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.kuncd.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.locate.plist (Shell Script 901bcab3 - installed 2017-07-16)    [running]    com.apple.locationd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.lockd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.logd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.logind.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.loginwindow.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.logkextloadsd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.lsd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.mDNSResponder.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.mDNSResponderHelper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.mbsystemadministration.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.mbusertrampoline.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.mdmclient.daemon.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.mdmclient.daemon.runatboot.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.mediaremoted.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.metadata.mds.index.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.metadata.mds.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.metadata.mds.scan.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.metadata.mds.spindump.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.mobile.keybagd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.mobileassetd.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.msrpc.echosvc.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.msrpc.lsarpc.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.msrpc.mdssvc.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.msrpc.netlogon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.msrpc.srvsvc.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.msrpc.wkssvc.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.multiversed.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.nehelper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.nesessionmanager.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.netauth.sys.auth.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.netauth.sys.gui.plist (Apple, Inc. - installed 2018-02-13)    [running]    com.apple.netbiosd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.newsyslog.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.nfcd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.nfrestore.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.nfsconf.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.nfsd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.nis.ypbind.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.noticeboard.state.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.notifyd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.nsurlsessiond.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.nsurlstoraged.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.ocspd.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.odproxyd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.opendirectoryd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.osanalytics.osanalyticshelper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.periodic-daily.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.periodic-monthly.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.periodic-weekly.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.pfctl.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.pfd.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.platform.ptmd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.postfix.master.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.postfix.newaliases.plist (Apple, Inc. - installed 2018-02-12)    [running]    com.apple.powerd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.powerd.swd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.powerlogd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.preferences.timezone.admintool.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.preferences.timezone.auto.plist (Apple, Inc. - installed 2018-02-13)    [loaded]    com.apple.printtool.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.racoon.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.rapportd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.remotepairtool.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.revisiond.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.rootless.init.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.rpcbind.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.rtcreportingd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.sandboxd.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.screensharing.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.scsid.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.secinitd.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.security.FDERecoveryAgent.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.security.agent.login.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.security.authhost.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.security.syspolicy.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.securityd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.securityd_service.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.seld.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.sessionlogoutd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.signpost.signpost_reporter.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.smb.preferences.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.smbd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.softwareupdate_download_service.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.softwareupdate_firstrun_tasks.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.softwareupdated.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.speech.speechsynthesisd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.spindump.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.startupdiskhelper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.statd.notify.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storagekitd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storeaccountd.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storeagent.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storeassetd.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storedownloadd.daemon.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storeinstalld.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.storereceiptinstaller.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.suhelperd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.symptomsd-diag.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.symptomsd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.sysdiagnose.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.sysdiagnose_helper.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.syslogd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.sysmond.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.system_installd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.systemkeychain.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.systemstats.analysis.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.systemstats.daily.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.tailspind.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.taskgated-helper.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.taskgated.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.tccd.system.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.testmanagerd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.thermald.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.timed.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.timezoneupdates.tzd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.touchbarserver.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.trustd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.tzlinkd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.ucupdate.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.uninstalld.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.unmountassistant.sysagent.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.updateEFIDesktopPicture-apfs.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.updateEFIDesktopPicture.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.usbd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.usbmuxd.plist (Apple, Inc. - installed 2018-01-06)    [not loaded]    com.apple.uucp.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.var-db-dslocal-backup.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.apple.vsdbutil.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.warmd.plist (Apple, Inc. - installed 2017-10-25)    [running]    com.apple.watchdogd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.wifid.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.wifivelocityd.plist (Apple, Inc. - installed 2018-01-19)    [running]    com.apple.wirelessproxd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.wwand.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.xartstorageremoted.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.xpc.roleaccountd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.xpc.smd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    com.apple.xpc.uscwoap.plist (Shell Script 75aced1c - installed 2017-10-25)    [not loaded]    com.apple.xsan.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.xsandaily.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    com.apple.xscertadmin.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.xscertd-helper.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    com.apple.xscertd.plist (Apple, Inc. - installed 2017-10-25)    [loaded]    com.vix.cron.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    ntalk.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    org.apache.httpd.plist (Shell Script 4f12bccd - installed 2017-07-16)    [not loaded]    org.cups.cups-lpd.plist (Apple, Inc. - installed 2018-01-19)    [loaded]    org.cups.cupsd.plist (Apple, Inc. - installed 2018-01-19)    [not loaded]    org.net-snmp.snmpd.plist (Shell Script 440756a - installed 2017-07-16)    [not loaded]    org.ntp.ntpd-legacy.plist (Shell Script d3a82e21 - installed 2017-07-16)    [not loaded]    org.openldap.slapd.plist (Apple, Inc. - installed 2017-10-25)    [not loaded]    ssh.plist (Shell Script edc54f2c - installed 2017-07-16)    [not loaded]    tftp.plist (Apple, Inc. - installed 2017-10-25)Launch Daemons: ⓘ    [loaded]    com.apple.installer.osmessagetracing.plist (Apple, Inc. - installed 2018-01-19)User Launch Agents: ⓘ    [loaded]    com.google.keystone.agent.plist (Google, Inc. - installed 2018-02-13) [Lookup]Internet Plug-ins: ⓘ    QuickTime Plugin: 7.7.3 (installed 2018-02-13)3rd Party Preference Panes: ⓘ    NoneTime Machine: ⓘ    Time Machine not configured!Top Processes by CPU: ⓘ         2%       WindowServer         1%       kernel_task         1%       fontd         0%       psTop Processes by Memory: ⓘ    1.14 GB       kernel_task    115 MB        WindowServer    97 MB         com.apple.WebKit.WebContent    83 MB         Dock    83 MB         SafariTop Processes by Network Use: ⓘ    Input         Output        Process name    32 KB         24 KB         mDNSResponder    5 KB          6 KB          assistantd    8 KB          3 KB          netbiosd    5 KB          4 KB          apsdTop Processes by Energy Use: ⓘ      4.90    WindowServer      0.04    identityservicesd      0.04    mdworker      0.04    mdworkerVirtual Memory Information: ⓘ    20.67 GB      Available RAM    19.14 GB      Free RAM    3.33 GB       Used RAM    1.53 GB       Cached files    0 B           Swap UsedSoftware installs (last 30 days): ⓘ    VPN365: 1.0.3 (installed 2018-02-13)    DeskApp for YouTube: 1.3 (installed 2018-02-13)    Go for YouTube: 1.8 (installed 2018-02-13)    Install information may not be complete.

CountryGirl56 · Answer

What is your connection speed? You need a fairly fast connection in order to stream 4K. Of course there is also the possibility the particular videos are popular.

dionysiosfromamaliada · Answer

EtreCheck version: 3.4.7 (461)Report generated 2018-02-13 04:28:58Download EtreCheck from https://etrecheck.comRuntime: 1:35Performance: ExcellentClick the [Lookup] links for more information from Apple Support Communities.Click the [Details] links for more information about that line.Problem: Other problemDescription:Video stuttering while playing 4k and 1080p videosHardware Information: ⓘ    iMac (Retina 5K, 27-inch, 2017)     [Technical Specifications] - [User Guide] - [Warranty &amp; Service]    iMac - model: iMac18,3    1 3,8 GHz Intel Core i5 (i5-7600K) CPU: 4-core    24 GB RAM Upgradeable - [Instructions]        BANK 0/DIMM0            4 GB DDR4 2400 MHz ok        BANK 0/DIMM1            8 GB DDR4 2400 MHz ok        BANK 1/DIMM0            4 GB DDR4 2400 MHz ok        BANK 1/DIMM1            8 GB DDR4 2400 MHz ok    Handoff/Airdrop2: supported    Wireless:  en1: 802.11 a/b/g/n/acVideo Information: ⓘ    Radeon Pro 580 - VRAM: 8 GB        iMac 5120 x 2880Disk Information: ⓘ    APPLE SSD SM0512L disk0: (500,28 GB) (Solid State - TRIM: Yes)        (disk0s1) &lt;not mounted&gt;  [EFI]: 315 MB        (disk0s2) &lt;not mounted&gt;  [APFS Container]: 499.96 GBUSB Information: ⓘ     USB30Bus         Kingston DataTraveler 3.0             DataTraveler 3.0 disk2: (15,55 GB)                (disk2s1) &lt;not mounted&gt; : 210 MB                Install macOS High Sierra (disk2s2 - Journaled HFS+) /Volumes/Install macOS High Sierra : 15.21 GB (9.94 GB free)        Broadcom Corp. Bluetooth USB Host Controller         Apple Inc. FaceTime HD Camera (Built-in)         Microsoft Microsoft Nano Transceiver 1.1      USB31Bus Thunderbolt Information: ⓘ    Apple Inc. thunderbolt_busVirtual disks: ⓘ    Macintosh HD (disk1s1 - APFS) /  [Startup]: 499.96 GB (475.00 GB free)        Physical disk: disk0s2 499.96 GB (475.00 GB free)    (disk1s2) &lt;not mounted&gt;  [Preboot]: 499.96 GB        Physical disk: disk0s2 499.96 GB     (disk1s3) &lt;not mounted&gt;  [Recovery]: 499.96 GB        Physical disk: disk0s2 499.96 GB     (disk1s4) /private/var/vm  [VM]: 499.96 GB        Physical disk: disk0s2 499.96 GB System Software: ⓘ    macOS High Sierra  10.13.3 (17D47) - Time since boot: about one hourGatekeeper: ⓘ    Mac App Store and identified developersSystem Launch Agents: ⓘ    [not loaded]    7 Apple tasks    [loaded]    182 Apple tasks    [running]    101 Apple tasksSystem Launch Daemons: ⓘ    [not loaded]    36 Apple tasks    [loaded]    185 Apple tasks    [running]    109 Apple tasksLaunch Daemons: ⓘ    [loaded]    com.apple.installer.osmessagetracing.plist (Apple, Inc. - installed 2018-01-19)User Launch Agents: ⓘ    [loaded]    com.google.keystone.agent.plist (Google, Inc. - installed 2018-02-13) [Lookup]Internet Plug-ins: ⓘ    QuickTime Plugin: 7.7.3 (installed 2018-02-13)3rd Party Preference Panes: ⓘ    NoneTime Machine: ⓘ    Time Machine not configured!Top Processes by CPU: ⓘ         4%       WindowServer         3%       kernel_task         1%       fontd         0%       Dock         0%       launchdTop Processes by Memory: ⓘ    1.21 GB       kernel_task    156 MB        TextEdit    124 MB        WindowServer    107 MB        com.apple.WebKit.WebContent    97 MB         com.apple.WebKit.WebContentTop Processes by Network Use: ⓘ    Input         Output        Process name    67 KB         150 KB        smbd    40 KB         30 KB         mDNSResponder    13 KB         7 KB          netbiosd    14 KB         1 KB          com.apple.Safari.SafeBrowsing.Service    6 KB          4 KB          apsdTop Processes by Energy Use: ⓘ      5.88    WindowServer      0.32    launchd      0.06    opendirectoryd      0.04    mdsVirtual Memory Information: ⓘ    20.18 GB      Available RAM    17.74 GB      Free RAM    3.82 GB       Used RAM    2.44 GB       Cached files    0 B           Swap UsedSoftware installs (last 30 days): ⓘ    VPN365: 1.0.3 (installed 2018-02-13)    DeskApp for YouTube: 1.3 (installed 2018-02-13)    Go for YouTube: 1.8 (installed 2018-02-13)    Install information may not be complete.

CountryGirl56 · Answer

Just to add, 25Mbs is the norm for streaming 4k videos.

dionysiosfromamaliada · Answer

Connection speed is more than fine at 40mbs while viewing the video.I must add that it doesn&#x27;t happen just with some videos but with all of them, even on the ad videos...

dionysiosfromamaliada · Answer

I actually did the test with the default 8 gigs of ram that was included by default and I had the same effect. The extra 16 gb of ram I installed have the same specs as the default ones. DDR4 at 2400mhz. I wouldn&#x27;t that kind of mistake I guess. When I bought them I actually did the appropriate research to find the exact match.Let me ask you this, Do you one of those machines? Latest iMac models  2017. Do you experience anything like that stuttering effect? Especially on 4k  with 60fps is quite visible, you can&#x27;t miss that if it is actually a common problem.Also I want to thank you for your help so far.

CountryGirl56 · Answer

You&#x27;re welcome. No need to be sorry. I don&#x27;t know if there&#x27;s been any reports of 2017 27" iMacs having video issues. I have a 2015 27" 5k iMac and i have no problems with streams, 4k or otherwise.Perhaps someone else will have an idea.

dionysiosfromamaliada · Answer

Thank you for your answer.I have a rather fast connection. 50mbps. The video buffer is at least 60% of the whole video. Also it wouldn&#x27;t justify the stuttering at 1080p I think.

dionysiosfromamaliada · Answer

This is the reportDropbox - EtreCheck.rtf

CountryGirl56 · Answer

I meant paste it here.

CountryGirl56 · Answer

BTW, did you disable the defaut options in EtreCheck? You shouldn&#x27;t.

dionysiosfromamaliada · Answer

Let me run the test again. Regarding VPN365 app I just installed it, I have the issues since the first time I unboxed the Imac from 0 day.

iMac 2017 27" chrome/firefox video stuttering

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