Time Machine can't see my external disk

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Level 1

4 points

Time Machine can't see my external disk

Hi.

I am trying to backup my M1 Pro Mac on an external hard disk. I've been using it as a backup disk of my MacBook Pro 2016 for 4-5 years without any problem. However, even if it is connected to my M1 Pro, Time Machine doesn't list it. The only option I can see is something about AirPort Time Capsule. I've just checked by using disk utility if there is a problem, but nothing was found. Is there anyone who can help me? Thanks in advance for your interest!

Selman.

MacBook Pro 14″, macOS 12.3

Posted on Apr 5, 2022 3:30 AM

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Answer 1

Top-ranking reply

kaz-k

Level 9

50,166 points

Apr 5, 2022 4:53 AM in response to baysalse

Hi,

As far as I know, old TimeMachine drive for previous MacBook Pro can't use for new MacBook Pro. You need to reformat with new MacBook Pro and connect old external drive as the new TimeMachine drive for new MacBook Pro.

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Answer 2

Apr 5, 2022 7:18 AM in response to baysalse

if you want to, you should be able to "inherit" the previous backups, and continue to add to them as your backup scheme.

.Pondini's Time Machine - Troubleshooting -- B5. Would you like to inherit (or re-use) the backup . . . ?

Note the there is a more convoluted process in the linked article that involves some Terminal commands.

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Answer 3

baysalse Author

Level 1

4 points

Apr 5, 2022 8:30 AM in response to Grant Bennet-Alder

Actually, it is easier to erase and format the external hard disk for me because I don't need old backups for now. But the solution you recommended is very helpful and may be useful for the next time. Many many thanks!

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Answer 4

baysalse Author

Level 1

4 points

Apr 5, 2022 6:40 AM in response to kaz-k

Oops, it is a bad new… Thanks a lot, I’ll try and write the result.

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Time Machine can't see my external disk

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