Sierra won't install: " file system verify or repair failed". What can I do to restart my computer?

I Have downloaded sierra and attempted a restart. however, I have a screen up now which states macOS could not install. " File statement verify or repair failed. Quit the installer to restart your computer and try again." I have done thisand it comes back to the same screen. What can I do?

G5, Mac OS X (10.4.11)

Posted on Sep 22, 2016 3:13 PM

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11 replies

Sep 24, 2016 7:10 PM in response to deanfromblackpool

I had the same problem but resolved it...I could never get out of the reboot loop without doing a full restore from a TimeMachine backup.


1) Booted into Recovery mode (Command+R)

2) Restored from TimeMachine backup back to El Capitain.

3) I did disk check with DiskUtil and fsck but neither found any problems.

4) Redownloaded Sierra install files and the install went fine after that.

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Sierra won't install: " file system verify or repair failed". What can I do to restart my computer?

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