How to Mount “Macintosh HD – Data” in the Finder in Target Disk Mode

catalinahard drive

I attempted to install the latest Catalina supplemental update on my 2019 iMac, however, after it downloaded and the Mac restarted it got stuck on the update screen, and it's been that way for 2 days.

I tried restarting and resetting the parameter RAM, which didn't really do anything, and it won't boot into Safe Mode; the system restarts right back into the update screen.

I booted up from an external drive running Catalina, hoping that I might be able to copy files to another external. I can see the Macintosh HD volume in the Finder, but not the Macintosh HD - Data volume, so I can't access my files.

I then booted up an older iMac and put the 2019 iMac into Target Disk Mode, but it's basically the same problem: Macintosh HD - Data shows mounted in Disk Utility, but I don't see it in the Finder.

System Integrity Protection is NOT enabled.

Any suggestions on how to mount Macintosh HD - Data via Target Disk Mode or from an external drive?

Best Answer

For those who might still have this problem when in target disk mode. Right click on the Macintosh HD - Data volume in Disk Utility and click "show in finder"

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