Make sure you get the tax back/do tax free shopping if you buy it at a shop that offers that to tourists.
That's something you do at the airport before you take your flight back home, right? I've never done any tax-free shopping, so I have no experience with that kind of thing. Are there any noteworthy tax-free shops that might carry Macs and which I should consider checking out?
Also, thanks to both of you who told me about how MacOS works. It's a relief to know I won't be locking myself out of understanding 50% of what's said onscreen if I end up buying a Mac there.
Since I've been doing some more research on the TGS, I've heard there's a games podcast called 8-4 that throws a party every year a few days before the TGS begins, and that last year it was done in Roppongi. If I end up going there, how would I go about to return to my Sakura House room around Tokyo University? I've heard trains stop at around midnight, so I'd probably have to take a taxi (probably expensive as hell for that kind of distance, right?).