I am unable to answer your question, but I want to tell you Windows is not a distro ! A distro is a distribution : an OS with programs provided along the system !
ie : GNU&Linux distributions, OpenBSD distribution, NetBSD, FreeBSD are distributions. In Windows there is nothing distributed ! (Just Notepad and IE was I said). The other programs can be software which you can use during a limited time to test, then if you want to be able to continue using them you will have to buy a license.
I don't know if you can run Linux directly in a Mac computer. You can run it at least in Virtualbox, which I know because there is a user who does that with many PCLinuxOS flavors (and even tests them in Virtualbox. ^^ )
Ok Thx to update my knowledge ^^