MacBook Pro 15” cannot start
after updating to the new os recently which is one week ago.
suddenly I cannot start my MacBook Pro. After loading few minutes then the screen turned blackout . Trying to restart booting all doesn’t work.
Question marked as
Try booting into Safe mode
<http://support.apple.com/kb/ht1564>
This will not load any 3rd party additions, it will load some more conservative Apple drivers (may cause screen flicker), and it will clear some kernel caches (a cache is saved data in a form that can speed up a program, but is totally redundant to the original source, and thus can be safely cleared). Booting into Safe mode is just an experiment, but can frequently eliminate any 3rd party interference, or a cached item out-of-sync with the world. (Verify Safe mode via Applications -> Utilities -> System Information -> Software -> Boot Mode -> Safe vs Normal)