After installing OSX 10.12.4 my macbookpro grinded to a halt. Only a white screen after reboot is visible.
- No safe mode
- no utilities, web or otherwise..
I found a similar discussion at I just updated to Sierra 10.12.4 My 2011 iMac starts to reboot with grey screen apple logo and progress bar fills in then system stops. Can't boot to safe mode
but no luck yet, it just doesn't work.
Any suggestions?
MacBook Pro, OS X El Capitan (10.11.1)
Just found this info. The Apple tech did not have me do #1 and I know I had done it before when my other Mac went down. This might be helpful. Also there's a "step-by-step" video which I haven't had a chance to check out. My Mac is being service since yesterday.
http://appletoolbox.com/2016/09/macos-sierra-not-working-how-to/
Mac Will Not Start after macOS Sierra Update
This is a common problem with new installs, primarily on old machines. You are able to install macOS Sierra but your machine shows a grey/white screen when you try to start it up. Please follow the Steps below in order to resolve the issue.
Ran into the same exact problem yesterday. Called Apple Support and they ran attempts to recover but nothing helped so advised me to take it in to an Apple Store to restore from a disk. Said they would do it for free. Unfortunately no Apple Store in my area so dropped it off at an affiliate store. This problem has me nervous as well and don't understand an iOS update can cause a crash. Apple needs to seriously resolve this issue with Sierra Update 10.12.4 immediately.
Done it all... nothing worked..
Even did a cold install with th
OSX CD this seemed to work at first. Fo a while I had an OS again, after updating to 10.12.4 same problem all over again.
Cannot understand why a super stable 10.12.3 system can be this messed up with a 'minor' update?
Restart the Mac and then immediately press and hold the option/alt key until you see your EFI boot screen which should show you a graphical representation of all bootable discs, choose your disc if you see it, or boot to recovery disc and try to run repair disc through disc utility.
See above, nothing worked except reinstalling with the original OSX CD leopard.
No safe mode, no utility, no nothing except white screens.
Had a very stable 10.12.3 system any ideas how to get my system back to that?
And now the combo downloadlink is gone..
still hope it's gonna be fantastic again, but probably not today
internet recovery doesn't work either, now I am getting nervous...
Restore your computer from your back. Use a backup made before updating.
How would that work without a diskutil, now it does not even boot anymore from CD.
nothing...
White screen after update to 10.12.4
