I have two identical Mac Minis and I updated each with all available updates. This caused both machines to go from OS X 10.9.2 to OS X 10.9.4. However, uname -a reports different kernel versions for each machine:

On machine oaxaca:

Darwin oaxaca.local 13.1.0 Darwin Kernel Version 13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20~2/RELEASE_X86_64 x86_64

On machine morelia:

Darwin morelia 13.3.0 Darwin Kernel Version 13.3.0: Tue Jun  3 21:27:35 PDT 2014; root:xnu-2422.110.17~1/RELEASE_X86_64 x86_64

Why does morelia have a higher kernel version (13.3.0) than oaxaca (13.1.0)? On oaxaca when I open App Store and click Updates, I am told that no updates are available, so it's not clear to me how to get oaxaca to show the same kernel version.

  • An update on this: I updated both machines to OS X 10.9.5 and installed the command line updates, but oaxaca still reports kernel version 13.1.0, while morelia now reports 13.4.0. – Dan Tenenbaum Sep 22 '14 at 17:18
  • Is the firmware identical? Did either system, or both systems, ever use a pre-release build of Mavericks? – Graham Perrin Feb 8 '15 at 0:04
  • Both systems have firmware version 2.8f1. They have never had a pre-release build of Mavericks installed, unless it was installed at the factory (which I'd hope is not the case). – Dan Tenenbaum Feb 9 '15 at 18:52

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