Find the OS X version and build number on your Mac

Every OS X update or upgrade has a version number and build number, which helps you to know whether OS X is up to date on your Mac.

Check About this Mac

From the Apple  menu, choose About This Mac. Your version of OS X appears directly below “OS X”: 

About this Mac window

El Capitan

Version Build
10.11.5 15F34
10.11.4 15E65
10.11.3 15D21
10.11.2 15C50
10.11.1 15B42
10.11 15A284

Yosemite

Version Build
10.10.5 14F27
10.10.4 14E46
10.10.3
with supplemental update
14D136
10.10.2 14C109
10.10.1 14B25
10.10 14A389

Mavericks

Version Build
10.9.5 13F34
10.9.4 13E28
10.9.3 13D65
10.9.2 13C64
10.9.1 13B42
10.9 13A603

Mountain Lion

Version Build
10.8.5 12F371, 12F45 or 12F20292
10.8.4 12E55
10.8.3 12D78
10.8.2 12C543, 12C60, or 12C20344
10.8.1 12B19
10.8 12A269
  1. If you have Mountain Lion v10.8.5 (build 12F37), you can install OS X v10.8.5 Supplemental Update to get OS X v10.8.5 (build 12F45).
  2. Build 12F2029 is available for the iMac (21.5-inch, Late 2013) with NVIDIA GeForce GT 750M only.
  3. If you have Mountain Lion v10.8.2 (build 12C54), you can install OS X v10.8.2 Supplemental Update 1.0 to get OS X v10.8.2 (build 12C60).
  4. Build 12C2034 is available for certain Macs only. It's installed by the OS X 10.8.2 Update for 13" MacBook Pro with Retina Display, 21.5" iMac (Late 2012), and Mac mini (Late 2012).

Earlier versions of OS X

Version Build
OS X Lion v10.7.5 11G56* or 11G63
OS X Lion v10.7 11A511
Mac OS X Snow Leopard v10.6.8 10K540 or 10K549
Mac OS X Snow Leopard v10.6.3
Retail installation disc
10D575
Mac OS X Snow Leopard v10.6
Retail installation disc
10A432, 10A433 (Server)
Mac OS X Leopard v10.5.8 9L30, 9L34 (Server 10.5.8 v1.1)
Mac OS X Leopard v10.5.6
Retail installation disc
9G66
Mac OS X Leopard v10.5
Retail installation disc
9A581
Mac OS X Tiger v10.4.11 8S165
Mac OS X Tiger v10.4
Retail installation disc
8A428
Mac OS X Panther v10.3.9 7W98
Mac OS X Panther v10.3.2
Installation disc
7D28
Mac OS X Panther v10.3
Installation disc
7B85
Mac OS X Jaguar v10.2.8 6R65 or 6R73
Mac OS X Jaguar v10.2.3
Installation disc
6G37, 6G35 (Server)
Mac OS X Jaguar v10.2
Installation disc
6C115
Mac OS X Puma v10.1.5 5S60, 5S66 (with Networking Update 1.0)
Mac OS X Puma v10.1
Installation disc
5G64, (5L14 or 5L17b with Security Update 10-19-01)
Mac OS X Cheetah v10.0
Installation disc
4K78

* If you have OS X v10.7.5 (build 11G56), you can install OS X v10.7.5 Supplemental Update to get OS X v10.7.5 (build 11G63).

Last Modified: