The Titans expansion pack isn't new at all, it's been out since 2003. It has not and will never be released on Mac. There might be a way to get the Windows version working on an Intel Mac, but I doubt it'll be easy.
Take my love, take my land, take me where I cannot stand.
I don't care, I'm still free, you can't take the sky from me.
Take me out to the black, tell them I ain't comin' back.
Burn the land and boil the sea, you can't take the sky from me.
There's no place I can be, since I found Serenity.
But you can't take the sky from me...