Andrew, ss I noted before, the one thing that I have not tried is going into the Library/Chaches that you mentioned . You didn't think it would make a difference so I thought I would defer but I can run it down if you were waiting for me to do so.
Sure, go ahead and do that. It is definitely worth a try.
So, if I'm understanding you correctly now, there has been no build 5 (Version 2023) AU plugin that works on your system? The reason I'm asking is because there was an AU validation problem that was specific to one of the 2023 release builds. I had been assuming that your problem was related to that but I think I misunderstood.
So, you're saying this build does NOT work, is that correct?
https://update.pgmusic.com/support/mpatch/bb2023_mac_update_build704_dawplugin_5.4.7.pkgTo be clear, download and install this package, then run the validation tool as described earlier and see if it completes successfully.
Moving on then, the plugin was updated last summer to support Apple's silicon chips, and at this point our earliest supported OS (for the plugin) was bumped from 10.7 to 10.9 (Mavericks). Since you have Sierra (10.12) that should not be a problem, but perhaps this is when it stopped working on your system for one reason or another, perhaps a missing dependency. You could do the same test as above, with two "2022" builds. To do this, follow these simple steps (You should read through all steps before proceeding, so you understand what you are doing.)
1. Open your Band-in-a-Box folder, and find the main Band-in-a-Box app (Band-in-a-Box.app). Duplicate this (click on it and command+D) and name the duplicate "Band-in-a-Box 2023.app".
2. Install Version 2022 with plugin build 4.6.15:
https://update.pgmusic.com/support/mpatch/bb2022_mac_update_build605.pkg3. Run the auval test and take note of the results. Ideally, copy into a text file to save.
auval -v aumu Oaw8 Manu
4. Install Version 2022 with plugin build 4.8.7. This is the first build that is a universal binary that natively supports both Intel and Silicon Macs.
https://update.pgmusic.com/support/mpatch/bb2022_mac_update_build609.pkg5. Run the auval test again as above. If the test succeeds with build 4.6.15 but fails with 4.8.7, then we know this is when it stopped working on your computer.
6. To get back to Band-in-a-Box 2023, do the following. The "Band-in-a-Box.app" will be 2022 at this point - delete this. Rename the "Band-in-a-Box 2023.app" back to Band-in-a-Box.app. Now you can install the Build 705 update patch:
https://update.pgmusic.com/support/mpatch/bb2023_mac_update_build705.pkg