Same problem with a full clean installed iMac Mid2011
- OS X 10.11.6
- The Grand 3.1.1.88 (Installed from the current full install on the steinberg www page)
- Studio One 3.3.1 Build 39379
- Cubase 8.5.20.169
If I move “The Grand 3.vst3” to a different folder to hide it, Studio One starts perfectly.
In Cubase everything works fine.
The problem with vst3 seems to be that I can’t generate a different vst3 folder to hide it from S1, only for The Grand 3. It seems you can only do that with vst 2.x plugins.