What about iOS on Android? i found it last day on an AD, http://iosonandroid.com/download/
Haven't tried it though, and i won't. I Don't like iOS, OSX Operating Systems i stick to the Unix and Windows OSes.
Or even better an Android Phone , with JoyOS 1.2.2 flashed in it, :P Its 100% look like an iphone, though it nowhere near close to an iphone.
Or even iPad Mini,
I never liked iPhones. I believe Price/Quality does not worth at all. I mean you pay a lot for a small quality of hardware.
Also beeing a closed source operating system, doesn't give the ability to the developer for further development and improvment , something that makes the phone completely obsolete in time...
Edit: Small Comparison: http://www.phonearena.com/phones/compare/Sony-Xperia-Z1,Apple-iPhone-5s,Google-Nexus-5/phones/8000,7710,8148
I haven't personally seen iOS on an Android, but have seen the opposite on an iOS device. Personally, I'd like to see how Ubuntu would work on a smartphone... I just don't have a spare smartphone lying around...
iPhones are overpriced, overrated and their quality is unjust. I've owned one before and it broke within less than a year of ownership. I've had plenty of Android devices and they've met every single qualification that I needed in a device.
I wouldn't run iOS on anything but Apple hardware. It's not supported and I doubt it would work very well. I think iPhones and iPads are nice devices, but they've yet to release something that suits my needs. I don't need a wifi tablet because I've got my computer and I prefer a larger screen on my wireless data device. I'm waiting for a 5in+ iPhone, but even if they released one I doubt it would be affordable. You really can't beat the value of the Nexus 5.
If you're using Mac, why don't you switch to iPhone?