External Hard drive not recognized after updating to Mac OS Sequoia 15.2

I am a film maker and got a lot of important files on my 72TB hard drive from Professional G-RAID Shuttle. I read that there is A LOT of people got the same issue. Can @Apple please solve this issue? I need to start working again. When I plugin the hard drive to my Macbook from 2016 with Mac OS Sonoma there is no problem using it. So the issue is the new MAC OS.


When upgrading I might have done a mistake by having the External Hard drive connector and up and running during the upgrade. There was a lot of restarts...


Can someone help me or is the only way to format and install an older Mac OS again?


Using a Mac Studio M1 Ultra from 2022.


Posted on Jan 2, 2025 1:41 PM

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Jan 4, 2025 9:15 AM in response to Freeman22

I suspect WD was using an older path for accessing that external storage, and some part of that path was deprecated with macOS 15. Probably a shift from what is known as a KEXT kernel extension to a newer and user-land driver extension DEXT to allow storage access. This better isolates things, so that a driver bug is less likely to corrupt or to compromise the whole system including activities and user data.


Promise Pegasus external storage went through a similar shift, starting with macOS 12.4 or so, IIRC.


Or in fewer words, WD requires drivers be loaded before connecting to macOS 15.


Highlights and details are included at the WD G-RAID support webpage:


https://support-en.wd.com/app/answers/detailweb/a_id/31112/~/steps-to-install-macos-driver-for-g-raid-shuttle


Have y’all tried that? If that fails, check with WD support. The G-RAID support forum is here:


https://community.wd.com/c/sandisk-professional/g-raid-hdd/279


PS: WD G-RAID storage is apparently soon to be SanDisk G-RAID storage, after the corporate split happening at WD.

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External Hard drive not recognized after updating to Mac OS Sequoia 15.2

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