I have verified that two stable versions work on 10.14.6 and my x64 Mac Mini (2018)
PlexMediaServer-1.28.2.6151
PlexMediaServer-1.29.0.6244
That should be enough to get a number people through the holidays.
I wrote up how I do a brand new install in another bug report.
If you run into problems, create a new Topic on the forum (with a lot of detail).
To do a downgrade though, you just stop PMS and drop the older version
into /Applications
and Replace
like you always do on a Mac.
If you run into problems, start a new topic.
Older versions can be found on Mac Filehorse, and you can compare your hashes to mine. If you were to drop those zips onto Virustotal.com you would see they are clean too. My original zips I got from Plex hash like this:
$ shasum *universal.zip
2cf82b505fe43a888164eb0d3bd1f33a8f546a4c PlexMediaServer-1.28.2.6151-914ddd2b3-universal.zip
39ea9ef5e7250741a484ec1e8f232b49415632d4 PlexMediaServer-1.29.0.6244-819d3678c-universal.zip