I installed Mavericks on my MBP Early 2011 15" on top of ML latest version. Things went smooth but when using it for work it started to first show strange images in a two screen setup. I restarted an switched off graphics accelerator switch (between integrated and separate graphics card). This worked fine then.
 
Tonight I had a FaceTime call and after a while the system got stuck completely with a black screen. When turning off and restarting the system booted, after showing the Apple logo, and got stuck right a afterwards just showing a white screen.
 
When booting into safe mode, the screen shows blue vertical stripes after a while, stuck too.
Booting into recovery mode does not work either.
 
I am really upset how Apple can create such a poor free upgrade bricking my whole system.

Any ideas?


ΠΗΓΗ: https://discussions.apple.com/message/23482811#23482811