This time the machine booted all the way through. Mkdir /Disabled_System_Library_Extensions When trying to boot Ubuntu Desktop or run the graphicstest in Grub the system would hang.Īt this point, running Apple Hardware Test hung right before the end of the standard test, possibly when doing a video test.īased on the advice in the Apple Discussions posts above I did the following: Verbose safe boot (Cmd+Shift+V) output everything that I'd expect to see but would then hang as described above.Īfter coming across more posts online of GPU related problems I revisited this as the cause:Īttempting to boot Ubuntu from a USB flash drive, I could only get as far as Grub. I also ran the Apple Hardware Test many times without it finding any issues. Boot from OS X installation on USB drive.Boot into recovery (including Internet Recovery).
Unsuccessfully, I tried the following, with each continuing to hang as described above: Initially I suspected hard-drive corruption and went about trying to remedy that. The boot would progress through the grey screen with the Apple logo and spinner, but just when it seems it should have switched to the login screen the Apple logo and spinner would disappear and hang on a blank grey screen.
Mac internet recovery gray screen pro#
My MacBook Pro 15" Late 2011 (MacBookPro8,2) with AMD Radeon 6770M exhibited display corruption and associated system crashes/resets over a period of two weeks before it entirely failed to boot.
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