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Why does my entire system freeze when I watch YouTube after Lion install?

10.7 Build 11A511 2.7 GHz Core i5 4GB 1TB HD


When I acess videos on youtube.com or even watch embedded videos my whole system freezes. I have tried other browsers etc and even in uninstalled and installed flash.

iMac, Mac OS X (10.7)

Posted on Jul 20, 2011 3:13 PM

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150 replies

Jul 21, 2011 12:48 AM in response to steevil

I've also have this problem. Also 2011 27" Imac core i5 Radeon 6970M. GUI freeze when when playing video's in any browser. Even had this caused by some flash adds it seems. ssh access still works b.t.w. however reboot command doesn't work. It seems to start as my network connection goes down but the screen doesn't change. Only way to reboot is to hold the powerbutton for a couple of seconds.

Jul 21, 2011 1:05 AM in response to steevil

Same problem here with a brand new 27" i5 iMac with 8MB of memory. It seems to happen with any YouTube video whether on the YouTube site or embedded somewhere else. The computer locks up and has to be turned off and on. This is a big hit with my Windows loving wife, but I'm a musician and rely quite heavily on YouTube, so this bug renders my shiny new iMac almost useless. I hope this is something that Apple is working on.

Jul 21, 2011 2:49 AM in response to steevil

Flash Player

  • Flash Player may cause higher CPU activity when playing a YouTube video.
  • Possibly related to disabled hardware acceleration.


http://kb2.adobe.com/cps/905/cpsid_90508.html#main_Flash_Player


No Lion verson - http://get.adobe.com/flashplayer/otherversions/


How to install the Java runtime (JRE) | Mac OS 10.7 Lion

http://kb2.adobe.com/cps/909/cpsid_90908.html


You'll need this - Java for OS X Lion

Jul 21, 2011 3:02 AM in response to steevil

I don't know if this is the answer, but I ran the Java Preferences utility, found that both 64-bit and 32-bit Java SE 6 are both installed, so I clicked the item at the top of the Java Preferences pane called "Enable applet plug-in and Web Start applications", and I now seem to be able to play YouTube videos with no problem. It may not last, but it's working right now.

Why does my entire system freeze when I watch YouTube after Lion install?

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