Anyone have experience with a Schiit Wyrd decrapifier?

Seems to me you need to set "priorities" to tell the computer that the connection is first priority. Instead of of no importance. What your computer is doing.. any task it thinks is most important, it will do those things and kill tasks it thinks are stupid. You need to make sure it understands the task IS NUMBER ONE important. Since I an a total computer idiot, I have no idea how to do that on a MAC. But I do know that is the problem.
You could Google "how to set priorities" in MAC (then all you have to know is what the name of your priority is...)

Elizabeth - Thank you, I will definitely do a search on that. I have other Mac's in the house.. so I can devote this mac to music playback.

Does email and text messaging interfere?

are you losing connection with anything else or just those two devices?

Just those 2 devices.
My MAC looses connection with my DAC causing me to have to restart devices. I've always had this problem occasionally.. I also have Bit Perfect running if that has any effect. I was wondering if noise from my Mac through the USB cable might be to blame?