While I somewhat agree that Apple's licensing of OS X is overly restrictive (though the reasons for those licensing terms are fairly complex), the OP is specifi

While I somewhat agree that Apple's licensing of OS X is overly restrictive (though the reasons for those licensing terms are fairly complex), the OP is specifically talking about testing web apps in IE, which is the only browser with >1.0 percent market share that does not run on both Windows and OS X.