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craig150 Author

Level 1

26 points

OS Catalina. 2 MAC HD data drives

After installing Catalina a second time, it put a second Mac HD data partition. Then when trying to use Time Machine, it failed. Because there are two drives with the same name HD data. How do I rename the drive or delete the Drive. How do I know which one Catalina is using?

iMac Line (2012 and Later)

Posted on Oct 11, 2019 4:26 PM

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craig150 Author

Level 1

26 points

Posted on Oct 31, 2019 8:30 AM

Finally an answer ;

back up your computer
power off then; enter recovery mode with the world spinning
select disk utility
show all devices; erase both hd data drives one at a time
select the Hard drive top layer; erase the drive
power off and open again in recovery mode and download Catalina
then restore your data from time capsule

everything is back to normal

after talking to a senior analyst ; the drives must be erased before installing catalina; otherwise it will just keep install new ones with the old data drives.

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OS Catalina. 2 MAC HD data drives

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