Well cocoonJS only gives you an xcode project file after you compile it with their online compiler. So if you are gonna do CocoonJS then you need some way of running Xcode to archive it to create the IPA.
I started by hackintoshing my laptop, but that became a pain with the OSx version restrictions on xcode. Finally just broke down and put up the 600 bucks to buy a mac mini. It's the only thing I use it for, but I'm glad I bought it. Just makes life easier :).