Volume hash mismatch problems

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Level 1

10 points

Volume hash mismatch problems

I'm having a lot of problems with my iMac Pro continually crashing over the last couple of weeks. It seems to be associated with a 'volume hash mismatch' message.

I got through to Apple support just the once (all the other times said it wasn't available). They advised to upgrade to the latest OS. This solved the problem for a few days but now it's come back again.

They also said that if the upgrade didn't help, I'd need to reinstall the OS. I'm a bit nervous about doing this but I've got everything backed up in Time Machine on an external disc.

My questions are...

Does anyone have any other advice on things I could try before reinstalling the OS?

Does anyone have any really simple step-by-step instructions on how to reinstall the OS and not lose any data?

Thanks

iMac Pro

Posted on Feb 1, 2022 1:07 PM

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Answer 1

drstir Author

Level 1

10 points

Feb 11, 2022 5:12 AM in response to drstir

I ended up having to take it in for repair. They couldn't resolve the problem and ended up having the hard drive/fusion drive replaced, and also one of the 16GB Ram chips. It's all been a bit of a saga, not helped by my trying to follow duff advice to reformat the original drive. Just hoping (praying) that the hash mismatch error message doesn't reappear. Although I'm not 100% confident...

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Answer 2

DonH49

Level 6

16,716 points

Feb 1, 2022 3:00 PM in response to drstir

First try this:

SMC reset https://support.apple.com/en-us/HT201295

Zap pram https://support.apple.com/en-us/HT204063

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Answer 3

Mar 1, 2022 7:21 AM in response to drstir

It is a shame that this is happening and you have to go through all of this to get it resolved. I am only a Mac user for a year and talked my husband into getting one too. We loved it at first, but I have had constant issues with one thing or another. Now, I have to go through this "Volume has mismatch" resolution. Better technical efficiency and support is needed that's for sure.

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