Add me to the list of folks experiencing this trouble. Using the H3000 2.5.1 AU with Digital Performer 8.07 on a Macbook Pro with OS X 10.10.3. Haven't tried the VST.
Patches take better part of a minute to load and interface seems a bit sluggish adjust just the Mix% parameter while a project is playing. Other plugs working just fine. Audio out of the H3000 otherwise works and sounds great.
Best,
Chuck
