External hard drive and the new iMac

I had an external hard drive that I used for my Time Machine on my MacBook Pro 2023 and I traded my pro in for an iMac desktop. I was going to format the external hard drive to use it with my iMac as a Time Machine .

So, I hooked it up to the iMac to reformat and the iMac said it was not recognized and it would not do it. I have never had that problem before. What gives? Whaat is wrong? Why won't it do it so I could use it?

I would appreciate any info.


Thank you,

Carol

iMac 24″, macOS 13.5

Posted on Sep 12, 2023 4:29 PM

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External hard drive and the new iMac

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