External Drives not recognised in Tahoe

[davidjames1701]

Hi, just installed Tahoe on my 2020 i7 iMac, but no external drives will show up in finder under Locations, inc the SD card reader, they all show in Disk Utility as unmounted, if I right click on any and select Mount, nothing happens, only 1 drive can be read in Finder, not in locations, but tagged in tags, I've tried First Aid in Disk Utility, Time Machine doesn't recognise anything, all drives are instantly recognised on my old 2013 MacBook Pro running Big Sur, any help would be very appreciated thanks
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[flowrider]

I have an M2 Ultra Mac Pro with nine internal SSDs listed as external. I also have a USB Hub. All my drives show up fine, and I have a card reader hooked up to the hub. When a card is inserted, it also shows up fine. No Issues.

Lou

 

[fisherking]

Hi, just installed Tahoe on my 2020 i7 iMac, but no external drives will show up in finder under Locations, inc the SD card reader, they all show in Disk Utility as unmounted, if I right click on any and select Mount, nothing happens, only 1 drive can be read in Finder, not in locations, but tagged in tags, I've tried First Aid in Disk Utility, Time Machine doesn't recognise anything, all drives are instantly recognised on my old 2013 MacBook Pro running Big Sur, any help would be very appreciated thanks
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an i7? try resetting the SMC (google for your particular mac). all my externals show here (some sometimes thru a hub).

 

[loby]

Most of my externals are showing up accept my Acasis 80gbs SSD External on M1 MacBook Pro.

Downgraded to macOS Seauoia and shows up fine.

 

[840quadra]

Hi, just installed Tahoe on my 2020 i7 iMac, but no external drives will show up in finder under Locations, inc the SD card reader, they all show in Disk Utility as unmounted, if I right click on any and select Mount, nothing happens, only 1 drive can be read in Finder, not in locations, but tagged in tags, I've tried First Aid in Disk Utility, Time Machine doesn't recognise anything, all drives are instantly recognised on my old 2013 MacBook Pro running Big Sur, any help would be very appreciated thanks
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Did you upgrade or install from new?

I had some issues with other items such as external NIC, seeing family sharing, and network drives. I decided to back up my machine, and wiped it completely starting from new. Ever since I erased and started from new, my machine has been working great.

Not the first time I have had to do this with a MacOS upgrade since I became a heavy user back in Panther days (10.3).