Is your Mac operating system up to date? Does it meet the system requirements of an app or device that you want to use with your Mac? Which macOS versions are earlier or later than the version you're using? To help answer these questions, you need to know which macOS version you're using now.
Check About This Mac
From the Apple () menu in the corner of your screen, choose About This Mac. The version of your operating system appears beneath “macOS” or “OS X” in the window that opens. If you need to know the build, click the version. This example shows macOS High Sierra version 10.13, build 17A365:
These are the versions and builds of each Mac operating system made available from the Mac App Store,* starting with the most recent. If your Mac isn't up to date, learn how to update to a later version of macOS or reinstall macOS.
macOS High Sierra
| Version | Build |
|---|---|
| 10.13.4 | 17E199, 17E201 |
| 10.13.3 | 17D47, 17D102, 17D2047, or 17D2102 |
| 10.13.2 | 17C88, 17C89, 17C205, or 17C2205 |
| 10.13.1 | 17B48, 17B1002, or 17B1003 |
| 10.13 | 17A365 or 17A405 |
macOS Sierra
| Version | Build |
|---|---|
| 10.12.6 | 16G29, 16G1036, 16G1114, or 16G1212 |
| 10.12.5 | 16F73 |
| 10.12.4 | 16E195 |
| 10.12.3 | 16D32 |
| 10.12.2 | 16C67 |
| 10.12.1 | 16B2555 or 16B2557 |
| 10.12 | 16A323 |
OS X El Capitan
| Version | Build |
|---|---|
| 10.11.6 | 15G31, 15G17023, 15G18013, or 15G19009 |
| 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 |
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 | 12F37, 12F45, or 12F2029 |
| 10.8.4 | 12E55 |
| 10.8.3 | 12D78 |
| 10.8.2 | 12C54, 12C60, or 12C2034 |
| 10.8.1 | 12B19 |
| 10.8 | 12A269 |
Earlier versions of OS X
- Lion 10.7
- Snow Leopard 10.6
- Leopard 10.5
- Tiger 10.4
- Panther 10.3
- Jaguar 10.2
- Puma 10.1
- Cheetah 10.0
You should always use the macOS that came with your Mac, or a compatible newer version.
* The Mac App Store is included with OS X Snow Leopard 10.6.6 and later.