Find out which macOS your Mac is using

Use About This Mac to see which Mac operating system is installed on your Mac.

Is your Mac operating system (macOS) up to date? Is it the macOS version required by a product or feature that you want to use? Which macOS versions are earlier (older) or later (more recent) than the version you're using? To answer these questions, you need to know which version you're using now.

If your macOS isn't up to date, you may be able to update to a later version of macOS.

Check About This Mac

From the Apple () menu in the corner of your screen, choose About This Mac. You'll see the macOS name, such as macOS Mojave, followed by its version number. To see the build number, just click the version number.

This example shows macOS Mojave version 10.14 build 18A391:

Below are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Mojave. And as updates to that macOS become available from the App Store or Software Update preferences, additional version numbers and builds are added to its table. 


Learn how to upgrade to macOS Mojave, the latest version of macOS.

Version Build
10.14.4 18E226
10.14.3 18D42 or 18D109
10.14.2 18C54
10.14.1 18B75
10.14 18A391

High Sierra

Version Build
10.13.6 17G65, 17G6029, or 17G6030
10.13.5 17F77
10.13.4 17E199 or 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


Version Build
10.12.6 16G29, 16G1036, 16G1114, 16G1212, 16G1917, or 16G1918
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

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


Version Build
10.10.5 14F27
10.10.4 14E46
10.10.2 14C109
10.10.1 14B25
10.10 14A389


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 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

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