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
That was record time!  So glad that you were able to not only troubleshoot the issue but get it resolved so quickly.

Congratulations!

Greg
New record time for a successful audio repair. Of course it helps that I'm close to Massachusetts. But still- Bricast received, diagnosed, repaired and shipped back my M1 all in one day. The M1 spent more time with Fed Ex than with Bricasti. Shades of old school  Maytag. 
Yep, I recently upgraded my Bricasti M1 to the SE version. It was sent all the way from Australia, Brian and his team made a super effort in getting a short turn around time (considering it was Xmas period).
If only all the other high end audio manufacturers are this good in their responses.
I've had exceptional and speedy service over the years from Bryston and Pass in addition to Bricasti. My Linn gear has never needed to be repaired, which is great too-