You can use you new Motu USB MIDI interface with OMS if you need to. After the latest version of OMS (2.3.8) is installed, you should install FreeMIDI 1.4 (or later). If you are on a G4, iBook, or DVD iMac you will need FreeMIDI 1.43. The FreeMIDI installer will place a MOTU OMS driver in the OMS folder, which can be found in the System folder. After restarting the computer, you can now run your OMS setup and detect you MOTU USB interface by hitting the search button when OMS prompts you to choose printer or modem port. OS 8.6 currently has the best USB compatiblity. If you have a USB interface we recommend updating your System Software to OS 8.6.