Be aware that Syntheway is NOT affiliated nor has any
relationship with VST AU Manager, it is merely information
about the app (no longer available from its developer).
This was
a free open source application called
VSTAU, that claimed to be an Audio Unit adapter
which theoretically allowed VST plug-ins to be used in AU hosts. This application created wrappers for your VST plug-ins
in that will make them available as Audio Units in programs like Logic Pro and
GarageBand.
VSTAU application, just we have
information from their developer, Seth Kingsley. Apparently it
is no longer available and worked only with
".vst" extension (VST format for Mac).
This was
a free open source application called VSTAU, that claimed to be an Audio Unit adapter which theoretically allowed VST plug-ins to be used in AU hosts. This application created wrappers for your VST plug-ins in that will make them available as Audio Units in programs like Logic Pro and GarageBand.See also: Syntheway's AU/VST/VST3 products compatible with all macOS: AU Audio Units (.component extension) and VST/VST3 (.vst/.vst3 extensions) for Mac
GUI Graphical User Interface of VSTAU