Time Machine backup failure

My 2012 27 inch iMac running Sierra with a 3TB fusion drive has worked flawlessly for 8 years, but now the time machine backup fails (worked with same disk since September) then suddenly stopped- it copies for about 15 minutes and then fails. The disk seems to be ok, and there are backup files on it. I bought a new 4TB disk, and it also fails in the same way. From searching online it seems this can occur and the solution i found was to give up and use SuperDuper!. Does anyone know how to get timemachine to work again?

thanks,

Posted on Jan 9, 2021 6:32 PM

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1 reply

rkaufmann87

Level 10

148,452 points

Jan 9, 2021 8:12 PM in response to JP123456789101112

Restart in SafeMode and then restart normally and retry.

By chance do you have any third party antivirus, cleaning or other similar apps installed?

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Time Machine backup failure

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