I have a UMC22 as well, like Mike I just wanted a cheap DAI to record myself. I am happy with it and it works fine.
I don’t know about drivers or anything like that, i did not add or download anything it just worked. It was so easy to use, I just plugged it into my Mac, opened GarageBand, it asked if it wanted me to use the interface it had detected and I clicked yes. That was it.
It lists one input with a ‘Midas’ preamp and the other input does not, I have tried both and can’t seem to hear a difference. It has the 2 inputs plus can take a XLR cable, I got an XLR cable thinking I might run through my amp into it, but have honestly never bothered, and just run the bass straight into it.
I would recommend it if someone was after a simple no frills unit at a good price, it works well for my use.
Cheers Brendan