Hi
I am fairly novice with Mac and SC and this is perhaps an obvious question but:
Where you install the file SuperColliderAU.component?
The README don't SAIDME.
PD: One more small small detail:
The file "Readme.rtf" in the folder "Optional Installs" says:
"1) Move the sc3-plugin-extensions folder to ~/Library/Application Support/SuperCollider/Extensions, creating any necessary directories."
The directory name is really "sc3-plugin", it might be better to upgrade it (while it is obvious)