Mac Book won't boot after upgrade to macOS Sierra

[mmobie]

Husband upgraded to macOS Sierra and didn't make a backup disk. Can't get computer to boot up, tried everything there is for booting up a locked computer, any suggestions?

 

[monkeybagel]

Hold down Command+R when you hear the Apple "bong" noise after pressing the power button. It will boot into recovery mode. Select Disk Utility and select your hard disk in the left column. Then press the First Aid button and allow it to scan the disk for file system errors.

 

[mmobie]

tried it, didn't work, tried the shift key for safe mode, try option-command-P-R. nothing works

 

[monkeybagel]

What exactly are you seeing?

 

[mmobie]

It trys to boot (but extremely slow), when it is almost done, it goes to white screen

 

[monkeybagel]

Have you tried holding Command+S when you hear the Apple "bong" after turning on the power?

 

[grahamperrin]

any suggestions?

There are at least two other recent topics about failures to boot, about apparent bricking. Please subscribe to those.

 

[monkeybagel]

It does have several SMC and EFI update payloads in the install package, so that is a possibility, if one of those failed. Let's hope not.

 

[scrmtrey]

Is it possible that this site from apple : https://support.apple.com/sl-si/HT201518

is not up to date ?

Because i have MacBookPro8,2 (early 2011) and the version of smc and efi listed on this site, does not match mine.


EFI: MBP81.0047.B2A (2015-001)
SMC:1.68f99 (SMC 1.6)

And i have :

EFI: MBP81.0047.B2C
SMC: 1.69f4


Sorry for hijacking your topic.

 

[m4v3r1ck]

Husband upgraded to macOS Sierra and didn't make a backup disk. Can't get computer to boot up, tried everything there is for booting up a locked computer, any suggestions?

Can't believe that anno 2016 people resist to make valuable back-ups. I do hope he hasn't lost any important files.

Good luck restoring his bricked device!

Cheers