External disk is not recognised and does not mount

App & System Services Core OS
stefantischer OP
Created Sep ’23
Replies 4
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Hi all, Since I updated to MacOS Sonoma beta, 6 I have the problem that my 4TB external disk (Rocket Pro) does not mount anymore and is not even recognized in Disk Utility. On other Macs with older system software, it mounts without any problem.

Am I the only one with this problem? Any suggestions?

I appreciate any help you can provide. Stefan

Replies  4
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Views  603
Participants  3
kruczynski OP
Sep ’23

Same issue here — several different drives. Disk Utility does see the volume, but I'm unable to mount it even then.

0
kruczynski OP
Sep ’23

I've found some additional steps that at least will get my drives mounted:

  • The mounting issue seems to happen after a restart
  • If, after restart, I log into one account, the drive(s) won't mount
  • Then, if I log into another user account on the machine, the drives do mount.
  • I can then log out of the second account and back into the first account, and the drives will mount (or stay mounted).

If I do this same set of steps but swap the accounts, the same thing happens — so I don't think it's a user account problem.

0
Mario_Celso_Jr OP
Oct ’23

Hi, it appears to be some problem with encrypted disks and Keychain.

I found a workaround in this article: https://www.tutonaut.de/en/Don%27t-mount-external-hard-drives-in-Sonoma.-Here-is-the-solution/

Using Terminal commands worked fine to me.

0
kruczynski OP
Oct ’23

Awesome find — that worked for me as well. Thanks!

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External disk is not recognised and does not mount
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