@jerryfields
I'm sorry to hear that you are having trouble with JuiceboxBuilder-Pro on your Mac.
I wish I could be of more help but it sounds like you might already have tried everything that I'm aware of.
Over the years, I've been able to collate all the problems and solutions that users have run into and I've documented them here in the forum.
You've no doubt seen and tried most of (if not all) the suggestions but, for the sake of completeness, here are the two threads/posts I think might be most relevant to your problem.
Unresponsive New Gallery and Open Gallery buttons in JuiceboxBuilder - https://juicebox.net/forum/viewtopic.php?id=5295
Troubleshooting JuiceboxBuilder installation and usage problems - https://juicebox.net/forum/viewtopic.php?id=5114
... installed Adobe Air update...
It's also worth noting that you'll need to be using AIR v33.1.1.744 (and not the latest version, AIR v51. See here for details: https://juicebox.net/forum/viewtopic.php?id=5318
Also, if you have a Mac which uses Apple Silicon (M1, M2, M3, M4 hardware), you may need to open JuiceboxBuilder-Pro using Rosetta.
This is noted as a Known Issue for Mac users on the AIR download page: https://airsdk.harman.com/runtime
Launch failure on M1 hardware. Some AIR applications will fail to launch when run on a device using Apple Silicon (M1 / ARM hardware). To work around this, please right-click on the application icon within Finder, choose "Get Info", and on the resulting dialog, select the checkbox "Open using Rosetta".
It's also mentioned here in our forum (with instructions and further links): https://juicebox.net/forum/viewtopic.php?id=5289
Here is the Apple support page regarding Rosetta 2: https://support.apple.com/en-us/102527
I don't think the AIR or Rosetta issues will be relevant to your problem (I don't think you'd have made it as far as JuiceboxBuilder-Pro's 'Start' panel otherwise) but I thought I should mention it.
Once again, I'm sorry I don't have a definitive answer for you but maybe other Mac users reading this can chip in and help out.
If I think of anything else that might help, I'll be sure to post back to let you know.