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

Yesterday I installed OSX Lion 10.7.1 and so far today no lockups!

I had this problem too. An AppleCare rep gave me this fix, and it so far hasn't happened again.

1. Finder

2. Go > Computer

3. Mac HD

4. Library

5. Internet Plug-Ins

6. Trash Flash Player.plugin and flashplayer.xpt

7. Go here: http://get.adobe.com/flashplayer/

8. Download Flash player, reinstall (close all programs first)

9. Empty trash

10. Reboot

Hope it helps.

All

Seems sensible that before anyone else says they too have this issue, they try the update that came out today as it appears to fix this issue. Won't do any harm to update flash also.

If you still have issues after that then there is more to worry about.

Glenn

SOLUTION, for now... My brand new imac had this problem for the first month and after a few trips to the genius bar (they were clueless as to why it froze) i demanded a new one (thinking it was a lemon)... guess what? it freezes too!! after much research i found this: http://tidbits.com/article/12394

here is the issue described in detail.. lion is the problem. the answer is wait for the lion update in which apple has yet to acknowledge this issue and promise a future solution OR downgrade to snow leopard and wait to install lion after the problems are fixed... im going with erasing lion and reinstalling snow leopard since i dont have time to not work with videos on my computer...

I too have the same issue. This is the worst software that I have ever bought in my life... it has slowed my mac lyk a old snail with an ulcer undr its stomak. Im ****** off frustrated n wat not.. the systm hangs. takes ages to open applications... the pain that I hv to go thru EVERYday is like my b%**$ sliding on a razor.. Im jus waitin for the weeknd to get this off n switch bak to my sweet Snow Leopard. My mac works like a windmill. i probably can supply power to the grid with the fan running so fast.

I am no longer encountering this trouble after applying patch OS X Lion 10.7.1.

Everything works as expected after returning from sleep mode, primarily no more lockups encountered thus far!

Thank you!

Have you applied the Lion patch (via Software Update)? This has solved the problem for most.

are you talking about "Software Update" below  in the menu bar? If so, I have done that... but no use.... I am so frustrated, coz I lovvved my mac like crazy... and now i am so much more heart broken 😟

Just to say "me too"....My Macbook with 4GB Ram and Nvidia 9400M graphics card runnung 10.7.1 is having all of the freezing issues as descibed above. Please fix Apple!!

For me, it turns out to be my router that conflicts with my 2011 iMac I experienced freezes while watching streaming video or after waking up the computer. Genius Bar couldn't replicate the problem but my computer freezed again as soon as I tried it at home. So I turned off my Belkin wifi and used the cable. It no longer freezes despite hours of streaming video. I now use airport wifi and so far so good.

tryed with flash trashing on lybrary , tryed enabling java on java utility

but nothing still freezing

please apple do something i cannot use the computer like that!!!!!

my system 1900

Bill, How's thing going with the Mac, have u managed to get youtube videos running. I only got my Mac at christmas there and is proving problematic, many of the same issues as yourself. My old man being a windows fan is walking around with that smug look on his face. Any advice or tips would be appreciated, cheers. G

Hey this has been driving me nuts - Any Youtube window would lock out my screen.

Updated to 10.7.3 and no help.

I use Google Chrome browser and the Adobe Flash thing did not need to be updated.

HOWEVER it did need to be updated for Safari.

Not sure if there's a true cause & effect here, but I updated my Flash via Safari, emptied the Trash, restarted, and now Youtube DOES NOT LOCK THE SCREEN in Chrome or Safari!

One side-effect was I lost the connection to my Wi-fi, but I was able to reconnect easily.

iMac 27-inch, Mid 2011

Processor 3.1 GHz Intel Core i5

Memory 4 GB 1333 MHz DDR3

Graphics AMD Radeon HD 6970M 1024 MB

Software Mac OS X Lion 10.7.3 (11D50b)

I'm having the same issues as some of you; my iMac completely locks up when I visit certain web sites (TechDirt, AppleInsider) and even though it's dealthy slow to get to, I can launch Activity Monitor and kill off 'Safari Web Content' which gives me enough time to close the offfending page and I'm back in business. So annoying!! I'll try to see if a flash update will help. Not too happy. 😠

I think this may be the same thing I'm experiencing... I am curious to know if any of you that are following this will clarify if this is the same bug I'm experiencing. How will you know? When ever this type of thing happens to my 27" Core i5 iMac, I am able to unfreeze it by pressing Volume Up, Volume Down, Mute, Chang the screen brighness... anything that brings up an "overlay" dialog from Mac OS (as seen here). Does this 'work around' work for anyone else here?