Just remember to rename your source files to "*.mm" instead of "*.m" otherwise the compiler will complain... if I remember correctly

[quote name='ms75214' timestamp='1299263938' post='4781828']
what's the deal with c++ on mac? i know they are pushing objective c, but can you use c++ if you want? i want to make something for the mac app store in c++.

Most of their APIs are Objective-C based, so you're going to have to deal with it for creating a UI for your app (making windows, buttons, menus, etc) and interacting with various services. Other than that though, you're free to implement all your business/game logic entirely in C++.
[/quote]
Yeah this is basically what Carmack did when he ported Wolfenstein for the iPhone.
Most of the code he used id the original code from years ago but he still needed to use some Objective-C where required.
You should really get around to learning Objective-C if you are going to do a lot of Mac work though.