18 January 2021
Ok this does work on my macbook pro M1 "sort of". its buggy, speed isn't as good as when pluged into an intel mac or windows PC with thunderbolt.
And for me my pegasus 2 R4 didnt' like being plugged directly into the macbook pros usb 4 ports what I had to do was plug it into my thunderbolt Caldigit TB3 plus dock to get the speed and stability back.
So it does work the driver no question but it's definitely a rushed job and requires some big fixes for sure.
Check out this screenshot. Which shows an endless display of alerts from macOS saying (translated): "Safely remove "Promise RAID before disconnecting or turning off".
I tried your suggestion @Paul Kerry with connecting via a Thunderbolt Dock (I have a TB3 Dock from OWC). But I have the same problem there as I have when connecting directly to the iMac.
Speed it not a problem, I get about 400 MB both read and write. My only problem is the constant disconnects, it's unusable. 😭
PS: Forum admins, uploading a screenshot didn't work. So I had to link to Imgur.