Fix MacBook Pro 2010 stability issues in OS X Lion by delete Preference File

MacBook Pro 2010 and 2011 users are reporting stability issues with NVIDIA 330M equipped Macs and Mac OS X 10.7 Lion. The stability issues including kernel panics, random system crashes, blank or black screens, inability to wake from sleep, external displays not working and assorted other headaches.


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Most affected Model seem to be MacBook Pro 15″ and 17″ with Core i5 and Core i7 CPU, switchable Intel HD 3000 and NVIDIA 330M GPU. Majority of problems triggered once the NVIDIA GPU is activated. An attempted workaround has been to use gfxCardStatus to force Mac OS X to always use Intel 3000 GPU.

Some effected users decided to downgrade back to 10.6 Snow Leopard until official fix comes from Apple. If you are effected by this issue also, you can try below fix by deleting Preference File.
Note: You’ll need to have the user home Library folder shown, or you can access it one-off with the keyboard shortcut used below:

– From the Mac OS X desktop, hit Command+Shift+G and enter the following path:
~/Library/Preferences/ByHost/

– Delete all files that contain “windowserver” in the name (you may want to back these up just in case)

– Reboot the MacBook Pro

Note from ArsTechnica says if you use an external monitor frequently, you will probably have to continuously repeat above procedure. Apparently this technique comes from Apple Care support technicians with positive user feedback as good temporary fix until official update comes from Apple or NVIDIA.

via OSXDaily
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