Even since El Capitan, the Mac OS supposedly takes care of that, but I see just the opposite. One of the features of Onyx is that it can Repair Permissions. You MUST get Version 3.2.1 (the first one on the list), given that you are using Sierra. It would be good to do the repair at both the Volume (ie, top) and Partition (ie, secondary) levels.Īlso, you should download, install, and run the excellent freeware program Onyx.
So, after you boot to that partition, you would select 4th choice, Disk Utility, on the menu, and then attempt to Repair your internal drive.
DOWNLOAD ONYX FOR MAC 10.12.2 HOW TO
This link shows how to boot to it, and what the capabilities are: To do that, you need to boot to the (hidden) Recovery HD partition on your drive. In any event, what you need to do is run Disk Utility in an "isolated" manner. How did you upgrade to Sierra, OS 10.12? Ddi you do an "upgrade in place", ie, run the upgrade "on top of" whatever prior OS you were using, or did you do a clean installation of OS 10.12 (now up to OS 10.12.1, and there is already a second beta of OS 10.12.2)?Īdditionally, do you still have the file "Install macOS Sierra" some place? Given that you have a backup, it should be OK to try it. I wonder if your internal drive is "corrupted/damaged", and can be resurrected/fixed by software? Do you happen to have either TechTool Pro or Disk Warrior? If not, then your only alternative is to try Disk Utility and see if that will help.
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