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Flash video player crashes OSX Lion

It seems that after resuming from sleep, flash video player crashes OSX Lion, necessitating hard reboot with power button. No crash report is ever available. What gives? I have to reboot my computer multiple times a day if I want to use flash while browsing. This occurs with Firefox and with Safari.


2011 iMac 3.4GHz Quad-Core i7, 8GB RAM

iMac, Mac OS X (10.7)

Posted on Aug 2, 2011 6:51 AM

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60 replies

Aug 18, 2011 10:48 AM in response to mattsileo

I was having the same problem. Try disabling hardware acceleration...this seems to have resolved the problem for me. Right click on a flash video, choose settings, go to the left tab for display on the bottom, deselect "enable hardware acceleration" and then close the settings window. Close/open your browser and hopefully this will help until a permanent resolution gets worked out.

Sep 10, 2011 2:41 PM in response to mattsileo

Most people seem to be suggesting this is a problem WHEN WAKING FROM SLEEP. But, i experience it even though my computer is set to Never Sleep.


And, yes, it's a problem only after i've upgraded to Lion.


I thought it was an issue with Yahoo Mail - just reached that 'conclusion' today. So, i avoided Yahoo, but the machine crashed anyway.... For me, it's nothing to do with clicking on a flash video. I'm not on youtube. It may have something to do with embedded video ADVERTISEMENTS within pages i incidentally visit. I'm not sure.


Either way, the whole relationship between Apple and Flash is seriously flawed. As devoted to Apple as i have been for the past 20 years, there's no way i can excuse this. Unfortunately for me, Apple, effectively, has a monopoly, since using a PC is NOT an option.

Sep 16, 2011 8:07 PM in response to mattsileo

I installed a Safari extension "ClickToFlash." Essentially, it prevents Flash content from loading automatically. On web pages where Flash is supposed to be present, you just get a gray box with the word "flash" in it. My computer hasn't crashed since i enabled it.


It's a pain to have to click the flash box and you also have no preview of what's there, but it's better than going through the rigamarole of having to restart every day and possibly losing a document/data.

Sep 19, 2011 12:21 AM in response to mattsileo

iMacs are apparently not the only sufferer of this problem... I am running a mid-2007 Macbook and have never had a problem playing flash video, until I upgraded to Lion. It is also not only after I wake from sleep... I Never had a problem watching flash videos in Panther, Tiger, Leopard or Snow Leopard. But, as soon as I upgrade to Lion when I start watching a flash video on YouTube, for example, the audio will start to skip like a broken record and the video will freeze. All the while the entire computer starts locking up, If i barely move my mouse while this is happening it will shoot across the screen so it is impossible to hit the pause button or close button to end the madness. It wont always cause a complete crash but it does sometimes. The video will freeze, the audio skips like a broken record and suddenly the black opaque crash screen scrolls from the bottome of the screen telling my to hard reboot... 10.7.1 did not fix the problem.... Since the problem did not start until Lion, absolutely blame Apple. It is obiously something they have done/not done since Snow Leopard... I'm fed up and will downgrade Tomorrow once I borrow an externall HDD to copy all of my essentials and downloads... I've never said this before, but I will now; Apple, I am dissapointed in you.

Oct 19, 2011 11:05 AM in response to bones89

One of the sources of trouble is corrupt fonts. I worked out a fairly easy process to identify which 17 of my 900+ fonts were causing the crash, see:


http://damnedfinesoftware.blogspot.com/2011/10/fsusage-when-adobe-flash-crashes- in.html


All of these fonts were validated by Apple Fontbook, but crashed during a system call from the Flash plugin into Apple font library code.


-- Sean

Flash video player crashes OSX Lion

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