Plex server updated on may old iMac that I use as the server. And now it won’t work

Plex Media Server Desktops & Laptops
3

I found a solution that worked for me.

I found this thread:

That lead me to a Filehorse page:
https://mac.filehorse.com/download-plex-media-server/old-versions/

Found loads of old versions. I had to go back to PMS v1.31 but it appears to be working. Newer versions were listed as compatible with MacOS 10.9 or later but I kept getting told that I needed 10.13 or later. Took me a few attempts before I found one that worked for me.

Hope that helps!

Note: When I ran Plex Player on my firestick it asked me to update, I selected “skip this version” and it just opened just fine.