Check About this Mac
From the Apple menu, choose About This Mac. Your version of OS X appears directly below “OS X”:
- To see the build number, click the version number in About This Mac.
- To find out whether a later version of OS X is available for your Mac, check for software updates or upgrades, or check the tables below. If you're using the version of OS X that came installed on your Mac, the build number may differ.
El Capitan
| Version | Build |
|---|---|
| 10.11.6 | 15G31 |
| 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 |
- 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).
- Build 12F2029 is available for the iMac (21.5-inch, Late 2013) with NVIDIA GeForce GT 750M only.
- 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).
- 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).