Setting up a relay on a mac - Easy
Now that Vidalia is no longer bundled with TorBrowser for Mac, the ability to set up a relay also disappears. But it could be easy if only you provided the links and info on your site !
Under "Configuring a Tor relay" you write "another option is to intall TBB and then a standalone Vidalia bundle on top of it", but you don't give a link to the standalone bundle. It took me a long time to find, when a simple click on your documentation page would have done the job. You should also specify that after installing Vidalia, in Parameters > General > Start Tor, you have to browse to Tor Browser in Applications, open it, open the Tor folder inside and choose Tor. That again took me a while to work out on my own !
If you could just add that link and info on your Documentation page, it would not be complicated at all for any Mac user to set up a relay. No need to plunge into the complicated world of Debian, VM and Homebrew !!