old external hard drive not supported in catalina

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CLOUD SITTER Author

Level 1

8 points

old external hard drive not supported in catalina

Can I reuse my unsupported backup hard drive after upgrading to catalina ?

iMac 21.5", macOS 10.15

Posted on Jan 29, 2020 8:48 AM

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Answer 1

MrHoffman

Level 10

146,803 points

Jan 29, 2020 11:14 AM in response to CLOUD SITTER

So you can’t select the top-level physical device in Disk Utility (and not a partition of it), and erase and repartition the whole device? If that’s not working, is it possible that this device has failed?

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Answer 2

CLOUD SITTER Author

Level 1

8 points

Jan 29, 2020 11:06 AM in response to mulberry58

The hard drive I was using for my Time machine backup says not supported in disk utilities after I installed catalina os upgrade.

Disk utilities won't let me erase or mount or restore. Is there a way to set it up to be used on Time machine in Catalina ?

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Answer 3

mulberry58

Level 6

10,436 points

Jan 29, 2020 9:05 AM in response to CLOUD SITTER

Reformat your external drive to MacOS Extended (Journaled) https://support.apple.com/en-us/HT208496

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old external hard drive not supported in catalina

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