The is not a standalone plugin but a bridge component used by Waves Audio to host its massive library of effects within your Digital Audio Workstation (DAW).
/Library/Audio/Plug-Ins/VST3/Unlike single-plugin VST3 files, a Waveshell allows one .vst3 file to contain and instantiate any licensed Waves plugin installed on the system. This modular approach reduces file clutter but requires the Waveshell to match the major Waves version installed. Vst Plugin Waveshell-vst3 9.91-x64 -vst3-
Using an older shell like 9.91 in a modern environment invites specific errors. Here is the troubleshooting matrix. Waveshell-VST3 9
: Unlike standard plugins where each effect (e.g., a compressor or EQ) is its own .vst3 file, Waves installs all its plugin data into a central "Plug-Ins" folder. The WaveShell file acts as a single point of entry that tells your DAW how to find and load the individual plugins within that central library. Default Path: /Library/Audio/Plug-Ins/VST3/