You should have told him to install
Parallels and enjoy software from both worlds.
I have a bit of lol at people using software selection as a major reason to choose something. It's like finding the one thing you can latch on to and run with. I guess you guys both recommend the iPhone over every other phone because it has the most software available for it too, eh? Everything else be damned?
I used to think the same way too, until I actually started using OSX. I've found apps for every single thing I want to do on my Mac. The only area it's lacking is games, and the casual computer user doesn't PC game anyways, he/she probably has a Wii or 360.