Mac OS Sonoma Ur44C

Is safe to upgrade to OS Sonoma? Is compatible with urc audio interface?

No, not yet.

What specific problems arise after upgrade?

I updated and so far so good, I will see how it behaves doing more tests.

I upgraded to Sonoma and no problems so far.

I upgraded and the OS stated the driver was incompatible and disabled it. Tried installing the beta and and the mac os stated it was incompatible

What version of the driver are you running? I have been using my UR44C every day in Sonoma with no issues.

I have Sonoma as well and since Ventura I get a message every now and then when I turn on my Mac Studio that a steinberg driver is no longer supported.
From time to time I get a message when I turn on my Mac Studio that a steinberg driver is no longer compatible and that I should contact the company.

Currently using the old Ur44 (not ur44c) and while the headphone outs are working, none of my inputs are - nor is the DSP mixer. Really frustrating.