MacOS crashes when watching youtube fullscreen

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MacOS crashes when watching youtube fullscreen

I have recently upgraded my MacBook Air to macOS Sierra. Whenever I start watching a youtube video in fullscreen macOS crashes and throws me to login page, closing all applications.

I haven't tried this with other video website, but happens on youtube very consistently. I am using chrome browser.

Posted on Oct 11, 2016 10:14 AM

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Answer 1

Leanne_68

Community Specialist

Oct 12, 2016 9:02 AM in response to naveen291

Hi naveen291,

Thanks for upgrading your Mac to os Sierra! I understand that when watching YouTube in full screen the Mac crashes and returns you to the login screen. If you have not done so already, try watching the videos in your Safari app and test the results. If it only occurs while using your Chrome browser, you can use the steps in this link to clear up the browser. Reset Chrome settings to default

If it occurs in both Safari and Chrome, try booting your Mac up into safe mode.

What is safe mode?

Safe mode (sometimes called safe boot) is a way to start up your Mac so that it performs certain checks, and prevents some software from automatically loading or opening. Starting your Mac in safe mode does the following:

Verifies your startup disk, and attempts to repair directory issues if needed

Loads only required kernel extensions

Prevents Startup Items and Login Items from opening automatically

Disables user-installed fonts

Deletes font caches, Kernel cache and other system cache files

Together, these changes can help resolve or isolate issues related to your startup disk.

Try safe mode if your Mac doesn‘t finish starting up

While in safe mode, check to see if you have any login or start up items active. These are apps that maybe running in the background and can potentially slow up your Mac and cause these issues.

macOS Sierra: If you think you have incompatible login items

After removing any login items, try restarting your Mac normally and testing the Youtube full screen video playback. Thanks for using Apple Support Communities to post your question. Have a nice day.

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