Something like that could potentially be useful for me to see if the scientific software I write/use on Linux is likely to compile/work on various Mac OS X devi

Something like that could potentially be useful for me to see if the scientific software I write/use on Linux is likely to compile/work on various Mac OS X devices (right now I just count on others to complain when things don't work). And there are plenty of use cases: * an iOS development offering (as long as iOS development is restricted to Mac OS X) * security research * integration with software not available on Linux (e.g. something Photoshoppy) * hardcore fanboys who can't stomach using anything not ordained by Apple