Roon Keeps losing connection from iMac to Topping D50s

No, but I unchecked exclusive and maybe that will do it.

I’ve got similar issues with a D50s, but I’m running Linux on an i5.
Roon loses the endpoint and this is sometimes just fixed semi-automatically (I can select the D50s again) and sometimes I just need to reboot the Dac.

So I’m leaning towards it being a problem with the dac.

Are you getting your power from the provided USB cable?

–MD

yep - the one with the barrel jack on the device end