No playback from my MacBook Pro to Bricasti M1


My digital front end consist of a Sim Neo 260D transport via balanced AES cable and a MacBook Pro via USB into a Bricasti M1 DAC. Until very recently everything worked great, but now I can't get any playback via the MacBook Pro (cd works perfectly). I tried a different AES cable without any result. 

The M1 no longer recognizes the M1, thus sound only comes out of the MacBook pro's own internal speakers which obviously isn't what I'm looking for. Said another way, the M1 no longer shows up on the MacBook pro's list of available devices.

Anyone encounter this sort of issue? I've reached out to Bricasti and await their response but in the interim- HELP! Your thoughts are appreciated! 
128x128zavato
I wound up speaking to Brian at Bricasti- called from work. He was already aware of my M1 issue. He suggested I ship the M1 to their factory. It's going out tomorrow-  
I would start with an SMC reset - May not work for sure, but an easy thing to try and has solved issues for my in the past.

http://osxdaily.com/2010/03/24/when-and-how-to-reset-your-mac-system-management-controller-smc/

NVRAM reset would be another thing to try if that doesn't do it

Best of luck we all know that it can be frustrating

Greg
My M1 in now en route to Bricasti- when I get a diagnosis I will update- this all is making me consider an Aurender player because somehow I think my M1 got zapped by my MacBook Pro