From our tests it seems that macOS 10.15 Catalina is currently incompatible with many AU plug-ins.
Those includes Sound Radix plug-ins and other manufacturers.
Who is affected by this issue?
Anyone who uses Audio-Unit under macOS 10.15 Catalina Public Beta / Developer builds with hosts using auval (Audio Unit validation).
We strongly advise any Logic Pro X, GarageBand and MainStage users to wait until a resolution is available.
In addition, we’d like to remind everyone that Catalina is the first macOS version to fully drop 32-bit support.
This breaks many applications that has any use of 32bit code.
- 32 Lives won’t work with Catalina. You can see any updates on the matter here