Dear P. Phillips, Thank you very much for your quick reply. And apologies for my slow response. My iMac refused to boot up yesterday, because it searched for a wireless keyboard, and no longer recognized my USB keyboard. So it couldn't boot. Cooling down overnight apparently did him/her good, because he/she starts up again. If High Sierra's last security update was in November 2020, then I'm wrong. In my memory a big update was still this year, about two months ago. I downloaded the program EtreCheckPro and purchased the power user package. See the report below: EtreCheckPro version: 6.5 (6F001) Report generated: 2021-07-16 11:47:15 Download EtreCheckPro from https://etrecheck.com Runtime: 11:15 Performance: Poor Problem: Computer is too slow Major Issues:     Anything that appears on this list needs immediate attention.     Adware - Adware detected.     Obsolete hardware - This computer may be considered obsolete. Minor Issues:     These issues do not need immediate attention but they may indicate future problems or opportunities for improvement.     SSD too slow - SSD is showing poor performance.     Apps crashing - There have been numerous app crashes.     Clean up - There are orphan files that could be removed.     Unsigned files - There are unsigned software files installed. Apple has said that unsigned software will not run by default in a future version of the operating system.     System modifications - There are a large number of system modifications running in the background.     32-bit Apps - This computer has 32-bits apps will not work on current versions of the operating system.     Kernel extensions present - This computer has kernel extensions that may not work in the future.     Sharing enabled - This computer has sharing services enabled that could be a security risk. Hardware Information:     iMac (27-inch, Mid 2010) - Obsolete!     iMac Model: iMac11,3     2,93 GHz Intel Core i7 (i7) CPU: 4-core     32 GB RAM - At maximum         BANK 0/DIMM0 - 8 GB DDR3 1333         BANK 1/DIMM0 - 8 GB DDR3 1333         BANK 0/DIMM1 - 8 GB DDR3 1333         BANK 1/DIMM1 - 8 GB DDR3 1333 Video Information:     ATI Radeon HD 5750 - VRAM: 1024 MB         iMac 2560 x 1440 Drives:     disk0 - Samsung SSD 850 EVO 500GB 500.11 GB (Solid State - TRIM: No)     Internal SATA 3 Gigabit Serial ATA         disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB         disk0s2 - M***********D (Journaled HFS+) 499.25 GB (348.03 GB used)         disk0s3 - Recovery HD (Mac OS Extended) [Recovery] 650 MB     disk1 - G-DRIVE USB 4.00 TB     External USB 480 Mbit/s USB         disk1s1 - EFI (MS-DOS FAT32) [EFI] 210 MB         disk1s2 - G*********B (Journaled HFS+) 4.00 TB (1.58 TB used) Mounted Volumes:     disk0s2 - M***********D         499.25 GB (348.03 GB used, 162.01 GB available, 150.96 GB free)         Journaled HFS+         Mount point: /     disk1s2 - G*********B         4.00 TB (1.58 TB used, 2.42 TB free)         Journaled HFS+         Mount point: /Volumes/G*********B Network:     Interface en0: Ethernet     Interface en5: iPad     Interface en3: iPhone     Interface en4: iPhone 2     Interface fw0: FireWire     Interface en1: Wi-Fi         802.11 a/b/g/n     Interface en2: Bluetooth PAN     iCloud Quota: 2.07 GB available     Printer sharing: Enabled System Software:     macOS High Sierra 10.13.6 (17G14042)     Time since boot: Less than an hour Configuration Files:     File /etc/sudoers size: Found 1624 B but expected 1563 B     /etc/hosts - Count: 1 Notifications:     EtreCheckPro.app         one notification Security:     Gatekeeper: App Store and identified developers     System Integrity Protection: Enabled     Antivirus software: Apple and McAfee     Printer sharing: Enabled Adware:     Launchd: /Library/LaunchAgents/macsearch.plist         Reason: Adware name match         Executable: /Library/Application Support/Agent/macsearch DistributerName ChannelId DeviceId Country BarcodeId Date Unsigned Files:     Launchd: /Library/LaunchAgents/com.adobe.AAM.Updater-1.0.plist         Executable: /Library/Application Support/Adobe/OOBE/PDApp/UWA/UpdaterStartupUtility -mode=logon         Details: Exact match found in the legitimate list - probably OK     Launchd: /Library/LaunchDaemons/com.adobe.SwitchBoard.plist         Executable: /Library/Application Support/Adobe/SwitchBoard/SwitchBoard.app/Contents/MacOS/launch.switchboard         Details: Exact match found in the legitimate list - probably OK     Launchd: ~/Library/LaunchAgents/com.adobe.AAM.Updater-1.0.plist         Executable: /Library/Application Support/Adobe/OOBE/PDApp/UWA/UpdaterStartupUtility -mode=scheduled         Details: Exact match found in the legitimate list - probably OK     Launchd: /Library/LaunchDaemons/org.virtualbox.startup.plist         Executable: /Library/Application Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh restart         Details: Exact match found in the legitimate list - probably OK     Launchd: /Library/LaunchDaemons/org.wireshark.ChmodBPF.plist         Executable: /Library/Application Support/Wireshark/ChmodBPF/ChmodBPF         Details: Exact match found in the legitimate list - probably OK     Running app: /Users/gebruiker/Library/UpdateMac/youngness/youngness     Running app: /Users/gebruiker/Library/endocritic/TqFQjYbB/BrAKErDv/zxfnSLCo/LBGqSyyj/pristine_saxifrage     Login Item: /etc/mach_init_per_user.d/com.adobe.SwitchBoard.monitor.plist     Plugin: /Library/Internet Plug-Ins/Silverlight.plugin     Plugin: /Library/Internet Plug-Ins/Default Browser.plugin     Apps: 101 Old Applications:     67 32-bit apps Kernel Extensions:     /Applications/Aimersoft Video Converter Ultimate.app         [Loaded] SystemAudioRecorder.kext - com.Perfect.Driver.SystemAudioRecorder (1.1.0 - SDK 10.6)     /Library/Application Support/VirtualBox         [Loaded] VBoxDrv.kext - org.virtualbox.kext.VBoxDrv (Oracle America, Inc., 6.1.4)         [Loaded] VBoxNetAdp.kext - org.virtualbox.kext.VBoxNetAdp (Oracle America, Inc., 6.1.4)         [Loaded] VBoxNetFlt.kext - org.virtualbox.kext.VBoxNetFlt (Oracle America, Inc., 6.1.4)         [Loaded] VBoxUSB.kext - org.virtualbox.kext.VBoxUSB (Oracle America, Inc., 6.1.4) System Launch Daemons:     [Not Loaded] 37 Apple tasks     [Loaded] 185 Apple tasks     [Running] 113 Apple tasks System Launch Agents:     [Not Loaded] 16 Apple tasks     [Loaded] 171 Apple tasks     [Running] 107 Apple tasks Launch Daemons:     [Loaded] com.adobe.ARMDC.Communicator.plist (Adobe Systems, Inc. - installed 2021-01-09)     [Loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (Adobe Systems, Inc. - installed 2021-01-09)     [Loaded] com.adobe.SwitchBoard.plist (? 68cad67 - installed 2018-05-11)     [Loaded] com.apple.installer.osmessagetracing.plist (Apple - installed 2020-10-31)     [Running] com.crystalidea.macsfancontrol.smcwrite.plist (Ilya Parniuk - installed 2019-12-05)     [Loaded] com.iwaxx.Debookee.PacketTool.plist (iwaxx Sarl - installed 2018-11-10)     [Loaded] com.jdi.ss.SSHelper.plist (SS Protect Limited - installed 2018-05-14)     [Loaded] com.linotype.FontExplorerX.securityhelper.plist (Linotype GmbH - installed 2018-05-11)     [Loaded] com.mcafee.PeriodicScan.plist (McAfee, Inc. - installed 2021-04-09)     [Running] com.mcafee.cspd.plist (McAfee, Inc. - installed 2019-07-17)     [Loaded] com.mcafee.datupdate.plist (McAfee, Inc. - installed 2021-04-09)     [Loaded] com.mcafee.genutility.plist (McAfee, Inc. - installed 2021-04-09)     [Loaded] com.mcafee.productupdate.plist (McAfee, Inc. - installed 2021-04-09)     [Running] com.mcafee.ssm.ScanFactory.plist (McAfee, Inc. - installed 2021-04-09)     [Running] com.mcafee.ssm.ScanManager.plist (McAfee, Inc. - installed 2021-04-09)     [Running] com.mcafee.virusscan.fmpd.plist (McAfee, Inc. - installed 2021-04-09)     [Loaded] com.microsoft.OneDriveUpdaterDaemon.plist (Microsoft Corporation - installed 2018-05-09)     [Loaded] com.microsoft.autoupdate.helper.plist (Microsoft Corporation - installed 2021-07-13)     [Loaded] com.microsoft.office.licensingV2.helper.plist (Microsoft Corporation - installed 2018-04-10)     [Loaded] com.microsoft.teams.TeamsUpdaterDaemon.plist (Microsoft Corporation - installed 2021-01-14)     [Not Loaded] org.virtualbox.startup.plist (? 700b9385 - installed 2020-11-12)     [Loaded] org.wireshark.ChmodBPF.plist (? d4207e05 - installed 2018-11-10) Launch Agents:     [Other] com.Ancylus.id.plist (? 0 - installed )     [Not Loaded] com.adobe.AAM.Updater-1.0.plist (? ffb65062 - installed 2018-05-11)     [Other] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a23d420d.plist (Adobe Systems, Inc. - installed 2021-02-10)     [Running] com.mcafee.McAfeeSafariHost.plist (McAfee, Inc. - installed 2018-05-29)     [Running] com.mcafee.menulet.plist (McAfee, Inc. - installed 2021-04-09)     [Running] com.mcafee.reporter.plist (McAfee, Inc. - installed 2021-04-09)     [Loaded] com.microsoft.update.agent.plist (Microsoft Corporation - installed 2021-07-13)     [Other] macsearch.plist (Adware - installed ) User Launch Agents:     [Not Loaded] com.adobe.AAM.Updater-1.0.plist (? 0 - installed 2018-05-11)     [Loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2021-03-05)     [Loaded] com.google.keystone.xpcservice.plist (Google, Inc. - installed 2021-03-05)     [Other] com.iskysoft.iTransferHelper.plist (DAWEI GUO - installed 2019-10-19)     [Not Loaded] com.linotype.FontFolderProtector.plist (Linotype GmbH - installed 2018-05-24)     [Other] com.sorage.qe.plist (? 0 - installed )     [Other] com.wondershare.TunesGoHelper.plist (Wondershare Software Co., Ltd - installed 2020-10-02) User Login Items:     [Not Loaded] CompressorHelper (App Store - installed 2018-05-21)         Modern Login Item         /Applications/Compressor.app/Contents/Library/LoginItems/CompressorHelper.app     [Not Loaded] LoginHelper (App Store - installed 2019-06-06)         Modern Login Item         /Applications/Handy Calculator.app/Contents/Library/LoginItems/LoginHelper.app     [Running] Macs Fan Control (Ilya Parniuk - installed 2021-04-16)         Application         /Applications/Macs Fan Control.app     [Running] Magnet (App Store - installed 2021-04-22)         Application         /Applications/Magnet.app     [Loaded] Microsoft Word (Microsoft Corporation - installed 2020-10-16)         Application         /Applications/Microsoft Word.app     [Not Loaded] Launcher Disabler (Microsoft Corporation - installed 2018-05-09)         Modern Login Item         /Applications/OneDrive.app/Contents/Library/LoginItems/Launcher Disabler.app     [Not Loaded] OneDrive Launcher (Microsoft Corporation - installed 2018-05-09)         Modern Login Item         /Applications/OneDrive.app/Contents/Library/LoginItems/OneDrive Launcher.app     [Running] iTunesHelper (Apple - installed 2021-05-03)         Application         /Applications/iTunes.app/Contents/MacOS/iTunesHelper.app     [Not Loaded] LaunchAtLoginHelperFree (App Store - installed 2019-06-18)         Modern Login Item         /Applications/myTuner Radio.app/Contents/Library/LoginItems/LaunchAtLoginHelperFree.app     [Running] Wondershare Helper Compact (Wondershare Software Co., Ltd - installed 2018-04-10)         Application         ~/Library/Application Support/Helper/Wondershare Helper Compact.app     [Running] Wondershare TunesGo Helper (Wondershare Software Co., Ltd - installed 2018-04-10)         Application         ~/Library/Application Support/Wondershare TunesGo/Wondershare TunesGo Helper.app     [Running] iSkysoft iTransfer Helper (DAWEI GUO - installed 2018-09-26)         Application         ~/Library/Application Support/iSkysoft iTransfer/iSkysoft iTransfer Helper.app     [Loaded] com.adobe.SwitchBoard.monitor.plist (?)         MachInit         /etc/mach_init_per_user.d/com.adobe.SwitchBoard.monitor.plist Internet Plug-ins:     AdobePDFViewerNPAPI: 17.012.20098 (Adobe Systems, Inc. - installed 2021-05-12)     Silverlight: 5.1.50901.0 (? - installed 2018-05-16)     AdobePDFViewer: 21.001.20155 (Adobe Systems, Inc. - installed 2021-05-12)     Web Control: 10.2.0 (McAfee, Inc. - installed 2021-05-17)     Default Browser: (? - installed 2019-10-17) Audio Plug-ins:     BluetoothAudioPlugIn: 6.0.7 (Apple - installed 2020-10-08)     iSightAudio: 7.7.3 (Apple - installed 2020-10-08)     AirPlay: 2.0 (Apple - installed 2020-10-08)     AppleAVBAudio: 683.1 (Apple - installed 2020-10-08)     BridgeAudioSP: 4.69.2 (Apple - installed 2020-11-17)     AppleTimeSyncAudioClock: 1.0 (Apple - installed 2020-10-08) CoreMediaIO Plug-ins:     AppleCamera: 400.6.01 (Apple - installed 2020-10-08)     iOSScreenCapture: 814.0 (Apple - installed 2020-10-08) Safari Extensions:     MKPlayer (App Store - installed 2021-07-14)     McAfee WebAdvisor (McAfee, Inc. - installed 2021-05-17) Backup:     Skip System Files: No     Auto backup: Yes     Volumes being backed up:         M***********D: Disk size: 499.25 GB - Disk used: 348.29 GB     Destinations:         G*********B [Local] (Last used)             Total size: 4.00 TB             Total number of backups: 118             Oldest backup: 2019-06-03 17:12:34             Last backup: 2021-07-16 11:02:00 Performance:     System Load: 2.59 (1 min ago) 1.68 (5 min ago) 2.11 (15 min ago)     Nominal I/O speed: 0.00 MB/s     File system: 30.92 seconds     Write speed: 257 MB/s     Read speed: 271 MB/s CPU Usage Snapshot:     Type Overall     System: 0 %     User: 1 %     Idle: 99 % Top Processes Snapshot by CPU:     Process (count) CPU (Source - Location)     EtreCheckPro 4.90 % (Etresoft, Inc.)     WindowServer 1.74 % (Apple)     kernel_task 0.62 % (Apple)     SystemUIServer 0.18 % (Apple)     VShieldScanner (4) 0.12 % (McAfee, Inc.) Top Processes Snapshot by Memory:     Process (count) RAM usage (Source - Location)     kernel_task 1.50 GB (Apple)     EtreCheckPro 854 MB (Etresoft, Inc.)     VShieldScanner (4) 633 MB (McAfee, Inc.)     mds_stores 236 MB (Apple)     trustd (4) 173 MB (Apple) Top Processes Snapshot by Network Use:     Process Input / Output (Source - Location)     mDNSResponder 1 MB / 229 KB (Apple)     apsd 8 KB / 6 KB (Apple)     netbiosd 11 KB / 3 KB (Apple)     SystemUIServer 0 B / 152 B (Apple)     softwareupdated 0 B / 0 B (Apple) Top Processes Snapshot by Energy Use:     Process (count) Energy (0-100) (Source - Location)     systemstats (2) 3 (Apple)     Macs Fan Control 2 (Ilya Parniuk)     com.crystalidea.macsfancontrol.smcwrite 1 (Ilya Parniuk)     WindowServer 1 (Apple)     launchd 0 (Apple) Virtual Memory Information:     Physical RAM: 32 GB     Free RAM: 22.18 GB     Used RAM: 4.68 GB     Cached files: 5.14 GB     Available RAM: 27.32 GB     Swap Used: 0 B Software Installs (past 60 days):     Install Date Name (Version)     2021-05-17 DynamicBranding (3.2.0)     2021-05-17 FMP (2.0)     2021-05-17 MSCUI (2.0)     2021-05-17 AntiMalware (3.4)     2021-05-17 WebProtection (4.2.2)     2021-05-17 StatefulFirewall (3.0.0)     2021-07-01 PDF Reader Pro Lite (2.8.1)     2021-07-01 AdGuard for Safari (1.9.19)     2021-07-01 XProtectPlistConfigData (2149)     2021-07-01 MRTConfigData (1.81)     2021-07-13 Microsoft AutoUpdate (4.37.21071101)     2021-07-14 MKPlayer (1.5.2) Clean up:     ~/Library/LaunchAgents/com.sorage.qe.plist         ~/Library/sorage.qe/sorage.qe.app/Contents/MacOS/sorage.qe         Executable not found     /Library/LaunchAgents/com.Ancylus.id.plist         /Library/Ancylus.id/Ancylus.id.app/Contents/MacOS/Ancylus.id         Executable not found Diagnostics Information (past 7-30 days):     2021-07-16 11:22:03 EtreCheckPro.app - Crash (2 times)         Executable: ~/Downloads/EtreCheckPro/EtreCheckPro.app         Details:             objc_msgSend() selector name: setAppearance:     2021-07-16 10:50:28 trustd - Memory (4 times)         Executable: /usr/libexec/trustd     2021-07-16 10:48:39 MRT.app - Memory (3 times)         Executable: /System/Library/CoreServices/MRT.app     2021-07-15 17:10:34 helpd - Memory         Executable: /System/Library/PrivateFrameworks/HelpData.framework/Versions/A/Resources/helpd     2021-07-15 16:07:28 mds_stores - Memory         Executable: /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Support/mds_stores     2021-07-15 16:02:37 mdworker - Memory         Executable: /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Support/mdworker     2021-07-15 15:45:51 OneDrive.app - Crash         Executable: /Applications/OneDrive.app     2021-07-14 14:43:00 VShieldScanner - Crash (3 times)         Executable: /usr/local/McAfee/AntiMalware/VShieldScanner         Details:             crashed on child side of fork pre-exec     2021-07-14 13:15:33 Software Update.app - Memory         Executable: /System/Library/CoreServices/Software Update.app     2021-07-14 13:02:58 mds - Memory         Executable: /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Support/mds     2021-07-13 19:03:03 distnoted - Memory (2 times)         Executable: /usr/sbin/distnoted     2021-07-12 18:26:35 logd - Memory         Executable: /usr/libexec/logd End of report Can you do something with this? Extra information: Booting is very slow (about 4 minutes) Loading the startup programs is very slow (about 10 minutes) Program startup is slow (about 1 minute) Another strange thing: Microsoft Word has recently started up without prompting after the iMac starts up. Please bear with me. I am 65 years old, and this is the first time I ask for help in this way. Sincerely, Peter Vermeulen The Netherlands