StudioLive connected with Firewire (with usb adapter) to Mac usb port. Universal Controls don't work. Sound output doesn't work (input works fine), "No Connected Devices" on the mixer's System Page 3.
I have to run the Mac sound OUTPUT through a Focusrite interface (connected with usb) and back into the mixer (with monitors) to get the Ouput sound. The computer shows the Presonus mixer as a System Preference's option, but the output will not work (again, the INPUT is recognized & works).
Is there a replacement board for the firewire port?
If your Mac has no FireWire port, use Thunderbolt. Apple sells an adapter from FireWire 800 to Thunderbolt, which works perfect. There is no USB connectivity for the AI family of mixers, because their architecture was designed on FireWire.
I have the adapter which works fine for the input. When I set up the output sound preference for Presonus I get nothing. I have to setup the sound output preferences for the scarlett interface.
You were talking about USB... The USB port on your mixer is for WLAN use and firmware upgrades only.
Do you really understand what you are trying to do? UC Control is the driver your computer needs to "see" the connected device. UC Surface is "software" you work with. None of them passes audio. What you see in UC Surface is a visualization of what is happing in your mixer (not in your computer!). Audio is only streamed through FireWire and needs a DAW (like Studio One) or Capture to record or play back audio signals. There is no audio sent to your computer's sound department.
By the way: "No Connected Devices on the mixer's System Page 3" means that you are trying to connect to a wired network for remote control. Relevant for you is page 8. If a FireWire is established (mixer and computer connect automatically), the status in the lower line will say "Driver On". Then start Universal Control, click on the small picture of your mixer and UC Surface will start.
Evyerything is well described in the manuals, especially in the Software Reference Manual. Have a look at the download page: http://www.presonus.com/support/downloads/StudioLive-2442AI.