AlumoAudio saidAlso, we can add Waves License Center to the list of currently incompatible applications. If transferring or adding Waves plugin licenses in Yosemite, you can currently only do this by adding it to a USB drive, and running them from there, as WLC is currently showing ‘Synchronisation Error’ when attempting to sign in and install licenses natively.
Update: This has now been updated, and just received confirmation from Waves:
We are pleased to announce that all Waves Native plugins V9 as well as the Waves License Center are now fully compatible with Mac OS X 10.10 Yosemite.This can be downloaded from here.