Hi philty, to start please install the latest patch update from here: https://www.pgmusic.com/support_macintoshupdates.htm#2020_426

Once that's installed, if Thru still doesn't work, please go to Options > MIDI Input/Output Ports, and on Bass choose "MIDI Plugins", then click <-- Set All Ports To This and click OK.

Next, click on the Plugins button in the File or Misc toolbar, and choose Default Synth. In the upper right, make sure the option selected is <AUi> Apple: DLSMusicDevice.

If you're unable to see DLSMusicDevice in the plugin list, click on the Options button in the Plugins window, then click Exclude MIDI Plugins and uncheck <AUi> Apple: DLSMusicDevice.

Now close that window and try playing.


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