Don't want to cast a negative but that website you have found also states these points in the FAQs
Which versions of OS X is the VST to AU Adapter compatible with?
[top]
10.3.9 "Panther" and 10.4.x "Tiger" versions.
Most of us are at least running 10.5 leopard or 10.6 Snow Leopard and they also state:
Are there any currently known compatibility issues? [top]
Mac OSX 10.5.x:
- Adapter preferences are not saved correctly - the adapter still functions however and wrapped plugins can still be used.
- The buttons for loading and saving VST presets underneath the plugin interface are blanked out. The buttons do work, but they aren't visible.
Logic 8 & GarageBand 4:
- Whilst wrapped plugins will work fine in these hosts, the user interface will not move around the screen correctly when the plugin window is moved.
Mac & Windows
- VST2.4 (or above) plugins are NOT supported. They may work in some cases but they are not officially supported.However although I have not tried this option below with VSTs an Apple Mac or even a Windows user could use this free alternative
http://www.kreatives.org/kristal/index.