Since version 16 uses fedora grub2 which supports EFI, MacBooks should theoretically boot Fedora directly without using rEFIt. Some older models of Apple Laptops require a little workaround though.
On fedora64.org Jason Montleon is describing how this can work. I’m going to describe as a “copy-paste-tutorial” how I installed Fedora 16 on my 5 year old MacBook using that directions.
The content however is old and might be outdated.