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Mac os high sierra unable to unmount volume for repair
Mac os high sierra unable to unmount volume for repair










mac os high sierra unable to unmount volume for repair

This installer package was no longer available from the Software Update service, but a similar package named  with the same dm tool was available.

mac os high sierra unable to unmount volume for repair mac os high sierra unable to unmount volume for repair

The script was downloading and expanding a macOSUpd10.13.6.RecoveryHDUpdate.pkg installer package from Apple’s Software Update service in order to get access to a dm tool included with the installer package. With some more digging, I was able to figure out why. I did some research on this and found that there was a script to do this on High Sierra and Mojave, but it didn’t appear to work anymore. Was there a way to create a new Recovery volume on a macOS Catalina boot drive that didn’t have one? They were cloning drives with macOS Catalina, but their cloning process was not including the Recovery volume. I recently got an email from a former colleague, requesting assistance with a problem they were seeing.












Mac os high sierra unable to unmount volume for repair