The DigiSystem INIT is not a multiclient driver, meaning once it's claimed by another resource, the MOTU audio system can no longer claim it. If you're getting a message like:
"Could not synchronize. Make sure that you have the same driver selected for input and output in the Sound Manager configuration dialog. (MOTU Audio System Mas SM Driver.cpp, 1336 [56:1])"
or "Error - 6011"
...when attempting to access MAS or a "no Digidesign hardware installed" message when attempting to access DAE turn the Digi sound manager driver off in the sound control panel:
1. Go to the apple menu/control panels/sound control panel.
2. For both sound ut choose "Built-in". For sound in, make choose anything _but_ "Digidesign"
3. Relaunch DP and try choosing DAE as the Audio System.
4. If it still doesn't work, restart the computer and verify Sound control panel settings, then try DP again.
5. If the problem persists, go to the system folder/preferences folder and trash the DigiSetup file and restart. With earlier versions like DAE 2.96, the DigiSetup file is in the root of the system folder.