Phoronix posted some benchmarks comparing OS X 10.8.5 and 10.9.0 releases on a 2012 Retina MBP

For those curious how the performance is impacted for the 2012 "Ivy Bridge" Retina MacBook Pro when upgrading to OS X 10.9 Mavericks, here's some fresh open-source benchmarks comparing the 10.8.5 and 10.9.0 releases for this Core i7 laptop with Intel HD 4000 and NVIDIA GeForce graphics.

For those interested in the performance of OS X Mavericks, I had delivered some OS X 10.9 benchmarks last month from the (Haswell-based) 2013 MacBook Air. However, this weekend on my main system (the 2012 Retina MacBook Pro connected to an Apple Thunderbolt Display running OS X and then Ubuntu Linux virtuaalized atop via VMware) I finally upgraded from 10.8.5 to 10.9.0. For those Apple/Linux users curious about the performance impact for this older but faster hardware than the MacBook Air, I did some before and after benchmarks.

The tests done from this Core i7 laptop with 8GB of RAM and 250GB SSD with Intel HD 4000 graphics and NVIDIA GeForce GT 650M graphics can be found on OpenBenchmarking.org via 1311183-SO-OSX109MAV08. OS X 10.8.5 vs. OS X 10.9.0 was compared while running XCode 5 and all the other same components throughout.

  OS X 10.9 Mavericks Benchmarks On The 2012 Retina MBP