Spore: galactic edition?

Does it have the same system requirements as the regular game, or slightly higher ones? And, here’s the big question: the box says “Mac” and “PC”. Does that mean that the disc inside to install it can be read on either system? I’m thinking about pre-ordering it today online, but I don’t want to get the one for PC and not be able to use it. Just trying to play it really safe….