No MIDI ports available after upgrading macOS

• Live Versions: All
• Operating System: macOS

If your MIDI ports are no longer listed in Live's Preferences and you've recently upgraded your macOS or used Apple's Migration Assistant, it is likely that the MIDI driver is corrupt or incompatible.

To fix this:

1. Make sure Live isn't running.
2. Open the Audio MIDI Setup utility under /Applications/Utilities/.
3. In the Audio MIDI Setup show the MIDI Window.
4. Click into the configuration chooser and select New Configuration
5. Close the Audio MIDI Setup.
6. Start Live again.

If this doesn't help or if the MIDI window does not open in the Audio MIDI utility, it may be necessary to remove all MIDI drivers from the system, for example when the error message The MIDI Server can't be opened appears.

To do this, delete all MIDI drivers in Macintosh HD/Library/Audio/MIDI Drivers. The drivers can be re-installed afterwards.