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
Based on the above, it seems maybe some of your MAC's settings are incorrect. The link below is from Ayre Acoustics and should be helpful in reviewing your MAC settings to output to your Bricasti DAC:.

https://www.ayre.com/usb-dac-apple.htm

The above link references the Sound settings and also the Audio MiDi setup settings.  It is possible that some software upgrade might of changed these settings.   

Please let us know if any of the above work.

In addition to the above Ayre link, Audioquest publishes an excellent computer audio setup guide that is a quick and valuable tool to help you get your computer and your stereo system on speaking terms. It is specifically written to get iTunes working, be it in an Apple or Windows world.   It includes several screen shots to help you find the right settings.  Please see this link:

http://www.audioquest.com/pdfs/CA-Setup-Guide.pdf

This link is very similar to the Ayre link so I suggest you check both web sites to ensure your Mac settings are correct.   I use to have a MAC Book Pro Computer connected to my Bricasti M1 DAC and it worked fine.   I recently replaced the MAC with an Aurender N10 Music Server.

Please verify the input selection source on your Bricasti DAC matches the output cable you are using.   Based on the above, I believe you are using an USB connection so please confirm this is the input selection selected on the Bricasti.   I also suggest you turn the Bricasti DAC on before you turn on the Mac Book computer.     Please keep us posted.

Followed the Ayre set up- the Bricasti just does not appear as an available device
I switched from apple to a dedicated pc computer and never had problems with Bricasti. I like the sound better as well
zavato:  I do not understand why your MAC Computer is not recognizing your Bricasti DAC (it should).   Since you followed the Ayre DAC setup instructions, and your MAC computer is still not recognizing your Bricasti DAC, I do not know where to go next.  

Please confirm the USB cable you are using works and that it is fully connected at both ends (sorry, I have to ask).  If possible, you might try a different USB cable.  Please double check that all your settings are correct.  

>> I emailed my Bricasti contact and requested he contact you to help solve your problem.   He already responded and said "If Zavota left us an email or phone number, we will get in touch with him on Monday to see what the trouble is".   Please call their main phone number on Monday.  Please keep me posted.