unable to unmount volume for repair mac air

#Unable to unmount volume for repair mac air install#

Alternative There are many solutions when the consumer confronts these difficulties. If the internal drive is usually leading to the concern because the Operating-system X Recuperation exists as a partitión on the actual physical drive, unable to change or unmount the internal drive, after that the preference must be provided to a network travel or an external drive. Causes The cause for this mistake is definitely the changes of the boot commute, or it can be being used by some other procedure or software. Or ‘ Cd disk Erase neglected with the mistake: Couldn't unmount disc.' The mistake happens in like situations like formatting Mac as well as dividing and confirmation and repairing of Macintosh disk. The error, which will be thrown, is certainly the: ‘Disk erase was unable couldn't unmount disc.' Also the System deployment equipment like Apple's Netinstall program or the DeployStudio fails, on accounts of this error. They are unable to remove or partition the push. Summary The user often encounters a problem, while handling some of the Macs, when they are not allowed to repair permissions or directory website in Storage Tool. Unable To Un Mount Volume For Repair Yosemite.

#Unable to unmount volume for repair mac air install#

I hope the above-mentioned solutions will be helpful to install High Sierra and fixes the problem “unable to unmount volume for repair”. Finally, reboot your Mac and High Sierra can be installed from internet recovery mode or USB drive. Went back to disk utilities, erased it (this time it did not complain at all), re-installed OS. Having struggled with Couldn’t Unmount Disk for hours, I re-started my mac with cmd+r, opened terminal and unmounted disk.

Started Mac using this drive (Press Option key after sound when starting up and select the High Sierra boot disk). After trying many different methods to unmount the internal drive, this is what finally worked - *Make sure you have a Time Machine Backup before doing this! I made an external USB High Sierra boot disk.