I just uploaded a build of 20.03 for the mac to:
https://dankulp.com/cb/This build is completely signed and notarized using my personal Apple Developer ID. Thus, it should be installable/runnable fairly easily even with gatekeeper enabled. That said, there are a few things to note:
1) This is using a custom build of wxWidgets, not the latest 3.1.3 release. There are a few fixes that are needed including a fix that isn't even committed to wxWidgets yet to allow wxSmith to at least "mostly work".
2) Signing/notarizing the app requires using the hardened runtime. My gut feeling is that this will prevent something from working correctly, but I'm really not sure. I only use Codeblocks for wxSmith so I haven't attempted anything else with it. Most likely we'll need to add entitlements for this to fully work.
3) It does NOT include the spellchecker, FileManager, NassiShneiderman, or profiler plugins as I don't have the deps installed for those.
Enjoy!
Dan