I bought the model PMXU63BT.1. The USB connection to my 2013 MacBook Air shows up as jelibr17 on MAC. I selected this as the input and output in my sound settings. Audio from Mac to Mixer did not work initially and worked after a reboot. But the audio from the Mac was choppy. Meaning. Mac audio plays for 10 seconds, then pauses for 1 second, then resumes. This is a Pyle compatibility issue due to Pyle.2 support. If you want to use channels 5 and 6 and USB together, you can't. It's either one or the other. So if I want to send stereo audio to my PC or MAC being played by my phone or iPad on channels 5 and 6 (left on one and right on the other) I can't. To get around this I had to send the speaker output from this unit to the front inputs of my Focusrite Audio Interface Solo and then send the Focusrite USB to my Mac.3. All microphone inputs are mono and are sent to both the left and right speakers. There is no pan control for each mic channel, so you can pan the mic just left or just right. The overall quality is good. I gave it 1 star because USB from Mac or PC hasn't been properly tested by Pyle, nor is it listed in the description. .Many Thanks
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