The problem is that you must also own a FaderPort original, and Audio MIDI Setup has some duplicate information that needs to be cleared out so the Mac see's the FaderPort 8 correctly.
Below are the instructions on how to properly set up the Faderport 8 on your Mac:
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1) First, please turn off the FaderPort 8 and quit Universal Control.
2) Next, open Application folder, then Utilities Folder. then open the Audio/MIDI Setup application on your Mac.
3) Then, in the menu bar go to Window > MIDI Studio
4) Once you are in the Midi Studio, remove the FaderPort 8 from the device list.
5) Upon removing the FP8 from the device list; go ahead and Power Up your FaderPort 8 while also holding down the first two select buttons ( located at the top left of the FP8; above Faders 1 and 2) at the same time. [ Putting you in the FP8's Operational Configuration Mode ]
6) Verify that your FaderPort 8 is setup in the proper Operational Mode for your DAW.
- Native Mode for Studio One , HUI Mode for Pro Tools, and MCU (Mackie Control) for other DAWs.
7) Once you have properly selected the operational mode for your DAW; open Universal Control and go ahead and check for firmware updates by selecting " Check Firmware " in the drop down menu.
8) If Universal Control alerts you that there is a firmware update available, go ahead and proceed with the firmware update process at this time.
**please note: do not power down your computer or Faderport 8 during this update process.
9) Once you have checked for updates and or updated your FP8's firmware, proceed by opening up your DAW of choice, configure the FP8 and testing the FP8 in a new session.