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MIDI driver deinstall, MacOS 9
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Q: How can I uninstall the MIDISport/Oxygen8 / Radium / Keystation classic* or built in MIDI port driver on USB Audio device from Mac OS 9

A:
- Disconnect the M-Audio device from your Computer’s USB port.
- Driver Version 2.x to 3.0.6: Delete the following files: System Folder->Extensions->MIDIMAN USB Support and System Folder->OMS Folder->MIDIMAN OMS Support.
- Driver Version 3.08 and higher: Delete the following files: System Folder->Extensions->M-Audio USB MIDI Support and System Folder->OMS Folder->M-Audio OMS Support. from your Computer’s USB port.

This FAQ ONLY applies to the following products:
- MIDISport Series
- Keystation 49 (no "e")
- Keystation 61 (no "es")
- Radium 49 / 61
- Oxygen 8 (not "V2")
- MIDI ports on M-Audio USB audio devices that support OS9.