I'm pretty sure they just meant that for the wiiU... wii-U... wii U... whatever
Mac's have always been historically crapped on in game releases for a laundry list of reasons.
We'll see... Dragon Age made it to mac, as has Steam. Many Mac owners with capable hardware don't want Windows and shouldn't have to get it just for gaming, not to mention maintaining multiple operating systems can be ...cumbersome (all my rigs have multiple personalities). Here's hoping Beth eventually ports to Mac and WiiU as they'd tap into brand new markets in both cases. Many are just as crazy religious about their Nintendos and Macs as others are about their Sony, MS, or PC platform. Nintendo and Mac are much more likely, it would seem, to be mod friendly. I'm just happy to be getting it for PC, but if WiiU allowed mods, I might just buy Skyrim twice as I know I'll want a WiiU for the imminent Metroid. Anyhow, even if future games were to come out on all five platforms, I'd bet there would still be timed exclusivity deals sold to the highest bidder.