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After updating to MacOS 12.4 my external drive will not mount. I get an error message that says "Could not mount “My Passport LHM”. (com.apple.DiskManagement.disenter error 49244.)"
How do I fix this issue?
Mac mini 2018 or later
Hi redPapu. Did you ever resolve this one?
Just ran into the same error ("Could not mount “Speedy”. (com.apple.DiskManagement.disenter error 49244.)") with my 4TB external SSD after updating from Big Sur to Monterey 12.4.
Like you Disk Utility's First Aid function failed on the drive. Really hoping to not erase it, since it's a 4TB drive and houses my photo library that I store outside of iCloud Photo Library. Fortunately i have it backed up with Backblaze. Perhaps of note is that it is formatted as "Mac OS Extended (Journaled)", rather than APFS. I have read that sometimes external drives are taking up to an hour to appear on macOS Monterey. Reference here <https://mjtsai.com/blog/2021/11/09/disk-utility-in-monterey/>:
I think I'll probably try to leave it for a while to mount, since I only JUST finished updating to Monterey. But yeah. This really feels like Monterey is responsible here.
One other thing I'll try before I go the erasing route is to try mounting it on another Mac that is not running Monterey yet.
Hi redPapu. Did you ever resolve this one?
Just ran into the same error ("Could not mount “Speedy”. (com.apple.DiskManagement.disenter error 49244.)") with my 4TB external SSD after updating from Big Sur to Monterey 12.4.
Like you Disk Utility's First Aid function failed on the drive. Really hoping to not erase it, since it's a 4TB drive and houses my photo library that I store outside of iCloud Photo Library. Fortunately i have it backed up with Backblaze. Perhaps of note is that it is formatted as "Mac OS Extended (Journaled)", rather than APFS. I have read that sometimes external drives are taking up to an hour to appear on macOS Monterey. Reference here <https://mjtsai.com/blog/2021/11/09/disk-utility-in-monterey/>:
I think I'll probably try to leave it for a while to mount, since I only JUST finished updating to Monterey. But yeah. This really feels like Monterey is responsible here.
One other thing I'll try before I go the erasing route is to try mounting it on another Mac that is not running Monterey yet.
BTW- my Mac is an M1 Mac Mini.
Thanks leroydouglas. I tried and the disk mounted but Time Machine reported it is unable to back up because the disk is "read only." I ran disk first aid. It failed and advised i should back up the external drive and reformat it. Maybe that's what I must do but this seems to have been a result of updating to OS 12.4, which is frustrating.
redPapu wrote:
BTW- my Mac is an M1 Mac Mini.
see if there is anything here—
WD HD not working with Big Sur 11.4 - Apple Community
Hi Krishen,
Thanks for checking. I tried everyone's suggestions but was unable to make it work. Eventually I ran out of time and patience, erased and reformatted, then began the backup all over again.
Larry
Thanks for the quick reply Larry! I think I’m going to do the same. I will reformat my existing drive as APFS, perhaps that will help (current format was HFS Plus Extended, which is getting a bit dated). My situation is a bit different in that I had data on my drive. I ordered the $189 “send me a USB drive with my data” option from Backblaze. The nice thing about that option is, if you return the drive within 30 days they give you a refund on it. Once I receive that, I’ll copy my data back into my reformatted drive.
it’s a shame because I feel like this was triggered by my macOS Monterey update. For the record, I did have one or two instances prior to the update, where the drive would not mount, but it was a long time prior (a year?) and resolved itself with a reboot.
Disk Management disenter error 49244
