Sierra stalls in booting (final step in installation)

Question

Sierra stalls in booting (final step in installation)

I've downloaded and installed Sierra successfully (I think) but when I restarted my MBP 13" '15 the booting stalls with the process bar complete.

When I boot the machine in SafeVendor the last error I see is:

AppleKeyStore: Operation failed (pid: 49 sel: 7 ret: e00002c2 '-536870206', -1, 100000)

After this every 20-30 sec. it prints:

SmartBattery: finished polling type 1, 2 or 4

type 4 by far the most common.

Earlier the booting/installation simply froze around 80-90% done, but I managed to make it go back from start on each reboot by clearing my PRAM (holding option, command, P, R when turning machine on)

When booting I can only manage to go to login screen and after I login this grey screen with the progress bar appears. And freezes at the end. :/

HOW CAN I GET TO USE MY MACHIBE AGAIN??

Thanks in advance

Posted on Nov 17, 2016 12:56 PM

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Answer 1

Nov 17, 2016 12:58 PM in response to Kaiser Carante

Hi,

Shut down your Mac.

Wait at least ten seconds then startup while holding down the Command + R keys. From there you can access the built in utilities to verify and repair the disk if necessary then restore OS X using OS X Recovery.

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Answer 2

Nov 18, 2016 7:20 PM in response to Carolyn Samit

Thanks for the quick reply!

I've tried that now and it does not seem to work... However.. I found this discussion https://discussions.apple.com/thread/6703178?tstart=0 about taking a backup from the disk utility screen. I'm considering doing that and reformat the internal disk.

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