I connected the Presonus Audiobox USB96 via a USB cable to my Mac where I run Studio One (Artist version). Usually I can select the Presonus Audiobox in the Set Up but now the set up says that there's no audio interface connected. I checked the USB-cable. It's brand new and it works. I have also tried using a Focusrite iTrack-Solo (that I was using previously). Sadly this is not being recognized either. I worked once this morning but no more although in case of the Focusrite the LEDS briefly flicker when booting my mac. I hope you can help me fix this. Thanks in advance and kind regards, Tido