VstPlugs: Trying to instantiate '/Library/Audio/Plug-Ins/VST/KORG/WAVESTATION.vst/Contents/MacOS/WAVESTATION'...
VstPlugs: Plugin is a Mach-O executable...
VstPlugs: Instantiate FAILED (MagicMatch failed - is no VST Plugin) !!!
VstPlugs: CreateInstance FAILED
Audio Plugins: Failed to open plug VST: WAVESTATION
Exception: Failed to initialize the plugin 'VST: Workstations: WAVESTATION'.
Error Message: Failed to initialize the plugin 'VST: Workstations: WAVESTATION'.
If you load the AU version before, the VST version will load then. But also something goes wrong while loading the AU, like multiple times plugin scanning (at least heavy loading time and filemon indicates this, but maybe it is caused by the other bug?). Normal loading in other DAWs.
4tey and me did some research on the topic already: Instantiate Failed (Magicmatch)
The au versions are wrappers for the vst versions. So after the vst was loaded/cached into memory once, it seems to work then.