Knowing the macOS version number can help you determine whether your Mac is up to date or meets the system requirements of other software or devices. Learn how to update the software on your Mac.
Check About This Mac
- From the Apple menu (), choose About This Mac. The version number appears beneath “macOS” or “OS X.”
- Click the version number to see the build number.
macOS Sierra
| Version | Build |
|---|---|
| 10.12.1 | 16B2555 or 16B2557 |
| 10.12 | 16A323 |
OS X 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 |
OS X 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 |
OS X 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 |
OS X 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 v10.8.2 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).
Learn more
The operating system that came installed on your Mac might have a different build number.