![]() ![]() 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 at Apple's discussion forums of GPU related problems I revisited this as the cause:Ģ011 MacBook Pro and Discrete Graphics Card orĢ011 MacBook Pro and Discrete Graphics CardĪttempting 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. Unsuccessfully, I tried the following, with each continuing to hang as described above:īoot into recovery (including Internet Recovery) 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. My MacBook Pro 15" Early 2011 with AMD Radeon HD 6750M exhibited display corruption and associated system crashes/resets over a period of two weeks before it entirely failed to boot. I found this according to my problem in this thread:īoot hangs on grey screen (even when booting from USB drive with fresh OS X install)
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