In the Presonus Install notes we see: "MacOS Mojave (10.14) and Catalina (10.15) users, please make sure that the plug-ins you are using match Apple’s compatibility requirements before updating to Studio One 4.5.3."
All my plugins work fine now in v4.5.2. I am NOT upgrading to Mac OS 10.15, I have Mac OS 10.14 working fine.
So how are "Apple’s compatibility requirements" specificly defined? How do we know their rules?