You can buy roller coaster tycoon for Mac. It's 49.95
You only choice is limited to virtual machines such as VMWare. And of course you will have to install MAC OS on your virtual machine.
Sadly... You cant. Only platinum works for Mac but you have to make sure that you buy the Mac version. But they do have Zoo tycoon 2 for Mac. Not an expansion but it is its own individual game. They are all very fun.
Boot Camp is a Mac OS X utility that takes you through the installation process. You can install Windows manually, or with software such as Parallels, Fusion or Virtual Box. (See links below)
Apple's EULA forbids running Mac OS X in a virtual machine (except for Mac OS X Server) or on non-Apple hardware. While it is possible to install Mac OS X in VMWare, it does not work out of the box. Because it is of dubious legality, WikiAnswers will not provide any information on how do so.
you could get a virtual system emulator. it is not that easy though. google virtual machine or vmware. you first need th extract the .iso from the mac first.. its not free either. you basically need to buy a mac.
You can't install XCode or its SDK on the windows. All you can is create a virtual machine, install Mac OS X there and then install XCode and SDK.
Virtual Skipper 5 only works with the Windows operating system and will not work with Mac OS X. Recent Macs with an Intel processor can run Windows (See links below) and then Virtual Skipper 5 can be used.
Roller Coaster Tycoon 3 is the latest one for a computer and also for Mac.
You can run Windows 95 in an emulator (such as VirtualPC or QEMU) on a PowerPC Mac. You can also use a virtual machine like VMWare, Parallels workstation, or VirtualBox to run it on an Intel Mac. You cannot install it directly on either, as the hardware is not compatible.
The easiest way to downgrade a Mac so it looks like a Windows box is to install and run Windows on the Mac.
Ubuntu can be installed on a Mac or run from a LiveCD (See links below). It can be run on a virtual machine on top of Mac OS X.