Reinstall imac os disk locked mac os x#
Reinstall imac os disk locked install#
Reinstall imac os disk locked pro#

Reinstall imac os disk locked pro#

The TechTool Pro surface scan may be considered optional, unless you really want to rule out hardware failure. You could also boot from a DiskWarrior recovery disk if you don't have another Mac.

Next run DiskWarrior and rebuild and replace the corrupt directory. Then run TechTool Pro utility and scan for bad blocks, none found, hardware is perfect. What I did to fix it was boot the MacBook in target disk mode and connect it to my desktop Mac, then wait until fsck failed and the disk mounted as read-only. However if you wait until fsck stops running silently in the background, OS X will eventually mount the drive in read-only mode, which is what you have observed as the volume being 'locked'. Fsck can take its sweet time, 30-45 minutes on my 750 GB MacBook Pro! If you run Disk Utility or similar utilities like Disk Warrior during this time, since fsck is already running on that drive, then the other disk utility will report a hardware error, even though the hardware is fine. Note that if you boot in target disk mode and attempt to mount the corrupt volume on another Mac, then what will happen (on 10.8.x or newer) is that instead of mounting the volume, OS X will run fsck in the background, although the user has no indication that is happening unless you look in Activity Monitor, and view All Processes (sort by CPU % for best results). I have even had OS X Disk Utility tell me that the volume had a 'hardware error' when, in fact, it did not.

Reinstall imac os disk locked install#

What I have observed is that if you are booted into the Recovery partition of that machine (or also I would guess, an OS X install drive), the corrupted volume will appear as 'locked', as you are seeing. OS X has a 'safety' feature where, if the system detects a problem with a volume, it can then set a flag in that drive's partition table that forces OS X to run 'fsck' (a unix disk utility) on the volume before it can be mounted. If not, it will boot back into recovery, but you may have better luck in recovery now after repairing first in single user. It may boot up into the main drive on its own then. Regardless, at the next prompt, run reboot. It may or may not tell you that some files have been removed. This mounts the root drive as writeable, and will remove damaged or unnecessary files. Then at the command prompt, run /sbin/mount -uw / If so, repeat the command until it just says the file system is ok. If there are errors, it will say the file system appears ok, but then there will be 'the file system has been modified'. At the end of the scrolling, follow the instructions listed.ДЄt the prompt type the following then hit enter: /sbin/fsck -fy That will boot you into single user mode, which should allow you to access the drive unhindered, outside of OS X.ДЄ black screen will appear, followed by a bunch of text. If the main drive is an option, select it, then before hitting enter, hold down both the Cmd key and the 'S' key. It should show at least the recovery hd, possibly even the main drive. All without the need for a recovery disc or thumb drive.Start up the computer holding the option key, which takes you to the Startup manager that will show you your boot options.

Reinstall imac os disk locked mac os x#

You should now have a fresh copy of Mac OS X installed, and your computer is back to its factory settings.

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