Safari lags when on YouTube

Question

Level 1

8 points

Safari lags when on YouTube

Hey Friends

Since quite some time when I'm on YouTube watching Videos, Safari gets terribly slow, the mouse cursor lags behind, and scrolling isn't responsive anymore. When quitting Safari and reopening YouTube, it's fine for a short period of time, but then safari starts to be unresponsive again.

I'm using Safari 9.1.1, on a late 2013 MacBook Pro Retina, 256Gb, 8Gb, 2.4Ghz

Does anyone have a suggestion?

Thank you for your help

MacBook Pro with Retina display, OS X Mavericks (10.9.2)

Posted on Aug 18, 2016 2:09 PM

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Answer 1

Top-ranking reply

dominic23

Level 10

83,976 points

Aug 19, 2016 12:32 PM in response to Nik SUI

If you have not tried this already, give it a try.

Go step by step and test.

1. Empty Caches

Safari > Preference > Advanced

Checkmark the box beside "Show Develop menu in menu bar".

Develop menu will appear in the Safari menu bar.

Click Develop and select "Empty Caches" from the dropdown.

2. Delete Cookies

Safari > Preferences > Privacy > Cookies and other website data:

Click the “Details” button.

Remove all cookies except ones from Apple, your internet service provider and banks.

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Answer 2

Nik SUI Author

Level 1

8 points

Sep 9, 2016 1:03 PM in response to Eric Root

Youtube is still lagging and is almost unusable. I did everything above.

I activated the error console in safari, and when I'm on Youtube and it's lagging it show a lot of error messages:

It says it blocked frames, so could that be the cause of the lagging??

thanks in advance

nik

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Answer 3

Nik SUI Author

Level 1

8 points

Aug 26, 2016 1:27 PM in response to Eric Root

EtreCheck version: 3.0.2 (306)

Report generated 2016-08-26 22:24:35

Download EtreCheck from https://etrecheck.com

Runtime 1:51

Performance: Excellent

Click the [Support] links for help with non-Apple products.

Click the [Details] links for more information about that line.

Click the [Remove] links to remove adware.

Problem: Computer is too slow

Hardware Information: ⓘ

MacBook Pro (Retina, 13-inch, Late 2013)

[Technical Specifications] - [User Guide] - [Warranty & Service]

MacBook Pro - model: MacBookPro11,1

1 2.4 GHz Intel Core i5 CPU: 2-core

8 GB RAM Not upgradeable

BANK 0/DIMM0

4 GB DDR3 1600 MHz ok

BANK 1/DIMM0

4 GB DDR3 1600 MHz ok

Bluetooth: Good - Handoff/Airdrop2 supported

Wireless: en0: 802.11 a/b/g/n/ac

Battery: Health = Normal - Cycle count = 690

Video Information: ⓘ

Intel Iris

Color LCD 3360 x 2100

System Software: ⓘ

OS X El Capitan 10.11.6 (15G31) - Time since boot: about 7 days

Disk Information: ⓘ

APPLE SSD SM0256F disk0 : (251 GB) (Solid State - TRIM: Yes)

EFI (disk0s1) <not mounted> : 210 MB

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

APPLE SSD SM0256F (disk1) / : 249.78 GB (73.47 GB free)

Encrypted AES-XTS Unlocked

Core Storage: disk0s2 250.14 GB Online

USB Information: ⓘ

Apple Inc. Apple Internal Keyboard / Trackpad

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ⓘ

Apple Inc. thunderbolt_bus

Gatekeeper: ⓘ

Anywhere

Adware: ⓘ

~/Library/LaunchAgents/com.applicationstats.AppStats.plist

One adware file found. [Remove]

Kernel Extensions: ⓘ

/System/Library/Extensions

[not loaded] com.increw.kext.speedit (0.32 - 2016-08-19) [Support]

[loaded] org.dungeon.driver.SATSMARTDriver (0.9 - SDK 10.7 - 2016-08-19) [Support]

Startup Items: ⓘ

CoreDuoTemp: Path: /Library/StartupItems/CoreDuoTemp

Startup items are obsolete in OS X Yosemite

System Launch Agents: ⓘ

[not loaded] 7 Apple tasks

[loaded] 141 Apple tasks

[running] 90 Apple tasks

System Launch Daemons: ⓘ

[not loaded] 47 Apple tasks

[loaded] 145 Apple tasks

[running] 98 Apple tasks

Launch Agents: ⓘ

[running] com.Monity.Helper.plist (2015-08-12) [Support]

[not loaded] com.adobe.AAM.Updater-1.0.plist (2015-11-23) [Support]

[failed] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a2 3d420d.plist (2016-07-15) [Support]

[loaded] com.google.keystone.agent.plist (2016-07-12) [Support]

[loaded] com.oracle.java.Java-Updater.plist (2014-04-19) [Support]

[not loaded] com.teamviewer.teamviewer.plist (2016-02-22) [Support]

[not loaded] com.teamviewer.teamviewer_desktop.plist (2016-02-22) [Support]

[loaded] org.macosforge.xquartz.startx.plist (2014-05-17) [Support]

Launch Daemons: ⓘ

[loaded] com.adobe.ARMDC.Communicator.plist (2016-07-15) [Support]

[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (2016-07-15) [Support]

[running] com.adobe.agsservice.plist (2016-08-13) [Support]

[loaded] com.adobe.fpsaud.plist (2016-06-29) [Support]

[loaded] com.google.keystone.daemon.plist (2016-07-12) [Support]

[loaded] com.microsoft.office.licensing.helper.plist (2015-01-16) [Support]

[loaded] com.oracle.java.Helper-Tool.plist (2014-04-19) [Support]

[loaded] com.teamviewer.Helper.plist (2016-02-01) [Support]

[not loaded] com.teamviewer.teamviewer_service.plist (2016-02-22) [Support]

[loaded] org.macosforge.xquartz.privileged_startx.plist (2014-05-17) [Support]

User Launch Agents: ⓘ

[loaded] com.adobe.AAM.Updater-1.0.plist (2015-03-29) [Support]

[failed] com.apple.FolderActions.enabled.plist (2014-04-20) [Support]

[loaded] com.apple.FolderActions.folders.plist (2015-03-15)

[running] com.applicationstats.AppStats.plist (2016-03-10) Adware! [Remove]

~/Library/Application Support/Spigot/AppStats

[loaded] com.facebook.videochat.[redacted].plist (2014-08-09)

[running] com.spotify.webhelper.plist (2016-08-26) [Support]

[running] com.srib.pssddaemon.plist (2016-01-19) [Support]

[loaded] com.valvesoftware.steamclean.plist (2016-08-07) [Support]

User Login Items: ⓘ

BetterTouchTool Programm (/Applications/BetterTouchTool.app)

Internet Plug-ins: ⓘ

FlashPlayer-10.6: 22.0.0.209 - SDK 10.9 (2016-08-19) [Support]

QuickTime Plugin: 7.7.3 (2016-08-19)

AdobePDFViewerNPAPI: 15.017.20053 - SDK 10.11 (2016-08-04) [Support]

AdobePDFViewer: 15.017.20053 - SDK 10.11 (2016-08-04) [Support]

Flash Player: 22.0.0.209 - SDK 10.9 (2016-08-19) [Support]

Default Browser: 601 - SDK 10.11 (2016-08-19)

SharePointBrowserPlugin: 14.4.8 - SDK 10.6 (2015-03-03) [Support]

Unity Web Player: UnityPlayer version 5.0.3f2 - SDK 10.6 (2016-05-17) [Support]

JavaAppletPlugin: Java 8 Update 101 build 13 (2016-08-20) Check version

3rd Party Preference Panes: ⓘ

Flash Player (2016-06-29) [Support]

Java (2016-08-19) [Support]

Time Machine: ⓘ

Skip System Files: NO

Mobile backups: OFF

Auto backup: NO - Auto backup turned off

Volumes being backed up:

APPLE SSD SM0256F: Disk size: 249.78 GB Disk used: 176.31 GB

Destinations:

Harddrive [Local]

Total size: 499.76 GB

Total number of backups: 1

Oldest backup: 21.01.16, 15:29

Last backup: 21.01.16, 15:29

Size of backup disk: Too small

Backup size 499.76 GB < (Disk used 176.31 GB X 3)

Backup macOS [Local]

Total size: 999.83 GB

Total number of backups: 2

Oldest backup: 13.07.16, 14:01

Last backup: 12.08.16, 17:12

Size of backup disk: Excellent

Backup size 999.83 GB > (Disk size 249.78 GB X 3)

Extern Niklaus [Local]

Total size: 749.81 GB

Total number of backups: 9

Oldest backup: 30.07.15, 15:37

Last backup: 05.01.16, 21:48

Size of backup disk: Excellent

Backup size 749.81 GB > (Disk size 249.78 GB X 3)

Top Processes by CPU: ⓘ

8% WindowServer

5% mdworker(14)

2% kernel_task

1% fontd

1% com.apple.WebKit.WebContent(4)

Top Processes by Memory: ⓘ

829 MB kernel_task

729 MB com.apple.WebKit.WebContent(4)

279 MB Spotify Helper(2)

197 MB mdworker(14)

98 MB Safari

Virtual Memory Information: ⓘ

19 MB Free RAM

7.98 GB Used RAM (740 MB Cached)

1.20 GB Swap Used

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Answer 4

Eric Root

Level 10

684,897 points

Aug 30, 2016 9:58 AM in response to Nik SUI

Try a restart.

Do a backup, using either Time Machine or a cloning program, to ensure files/data can be recovered. Two backups are better than one.

Try setting up another admin user account to see if the same problem continues. If Back-to-My Mac is selected in System Prefeences, the Guest account will not work. The intent is to see if it is specific to one account or a system wide problem. This account can be deleted later.

Isolating an issue by using another user account

If the problem is still there, try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don't do them all at once.

Safe Mode

Safe Mode - Mavericks

Safe Mode - About

Safe Mode - Yosemite

Safe Mode - About El Capitan

Safe Mode Startup – El Capitan.

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Answer 5

Eric Root

Level 10

684,897 points

Sep 10, 2016 6:42 AM in response to Nik SUI

Safari/Preferences/Advanced - enable the Develop menu, then go there and Empty Caches. Quit/reopen Safari and test. Then try Safari/History/Show History and delete all history items. Quit/reopen Safari and test. You can also try try Safari/Clear History…. The down side is it clears all cookies. Doing this may cause some sites to no longer recognize your computer as one that has visited the web site. Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library./Caches/com.apple.Safari/Cache.db and move it to the trash.

Go to Safari Preferences/Extensions and turn all extensions off. Test. If okay, turn the extensions on one by one until you figure out what extension is causing the problem.

Safari Corruption See post by Linc Davis

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Answer 6

VikingOSX

Level 10

119,465 points

Sep 10, 2016 7:42 AM in response to Nik SUI

Your Etrecheck post shows that your machine is running out of RAM and swapping to your boot drive. This will make your Mac run slow as ..ll. Quit all applications that you are not immediately using to free up your available RAM. If you have just finished playing a game, I would reboot before using Safari.

If you have just powered on your Mac, it will be sluggish for a few minutes because there is considerable house-keeping in progress by System processes that detract from your CPU and storage response. Aside from all of the other recommendations here, I would boot into Safe mode, followed by a normal reboot. Wait five minutes, and then check Safari again with Youtube.

If there is network congestion, or edge device failure in the hops to the Youtube server, then that will contribute to the slowness, and video aberrations.

Note the wall time that you are experiencing the slowness. From Launchpad : Other, click on Console, and at the bottom of the console log, look for your current time, and see if there are any entries from Safari that may suggest errors. Quit Console when you are done.

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Answer 7

Aug 18, 2016 2:19 PM in response to Nik SUI

Safari 9.1.1 and Mavericks 10.9.2..

The problems may be due to outdated software.

Open System Preferences > App Store then click Check Now or open the App Store then select Updates from the menu.

Aside from that, most YouTube content requires Flash so open System Preferences > Flash Player then select the Advanced tab then click Delete All under Browsing Data and Settings. Quit and relaunch Safari and try video.

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Answer 8

Eric Root

Level 10

684,897 points

Aug 19, 2016 6:42 AM in response to Nik SUI

Try going to Safari/Preferences/Extensions and disable all extensions. Quit Safari, reopen, and see if the website will now load. If so, enable extensions one or two at a time until you find which extension is causing the problem.

Reply

Answer 9

Nik SUI Author

Level 1

8 points

Aug 23, 2016 10:24 AM in response to Nik SUI

Thank you for your ideas!

Unfortunately the steps didn't help. I haven't any extensions installed, I deleted all the cookies, and emptied my cache, but YouTube still doesn't work properly. When I click for example to pause the video, the window freezes, and it pauses the video after about five seconds. Or when I try to scroll in the timeline, it's lagging behind significantly.

OSX is also updated...

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Answer 10

Eric Root

Level 10

684,897 points

Aug 24, 2016 7:24 AM in response to Nik SUI

Try running this program and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information