I was doing a research trying to see how many beta of OS X there are before the final release. We have already the beta 4 for Mavericks and Apple started to send iBooks for Mac in the App Store. So we can expect an early release of Mavericks? How many beta did Lion and Mountain Lion had before the GM? Seems like OS X requires much less work than iOS this time (obviously because OS X Mavericks implemented only few things compared to the redesigned iOS..) so yeah, my bet is that it will come out before iOS 7.