HT204156: About the screens you see when your Mac starts up
Learn about About the screens you see when your Mac starts up
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Jan 24, 2016 11:18 PM in response to Ladywriterjanby bruxxx,Did you ever get an answer or resolve this?
I just experienced the same thing. My screen started to flicker and then
just went to this black with thin white lines pattern on it.
When I rebooted it came back up normally for a short while and then did
the same thing. Over the next 20 minutes or it it would go to that screen
as soon as the boot progress line would quit.
I tried booting from another boot partition, same thing.
I tried to boot with the shift key held down ... thought I am not sure what that
is supposed to do, but it just hung at an all white screen.
I'm assuming this is probably a hardware problem?