I'd be very surprised if there are more OS X installations than Linux installations (or even close for that matter). Linux runs more servers, more phones, and

I'd be very surprised if there are more OS X installations than Linux installations (or even close for that matter). Linux runs more servers, more phones, and more embedded devices (set top boxes, routers, GPS's, etc). OS X is limited to Apple products, which, while popular, are not nearly as pervasive.