The Computer Guy, Seattle David Anders

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OSX – Troubleshooting Finding your Mac OS X version

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Finding your Mac OS X version and build information


Learn how to find your Mac OS X version and build
information. This information is helpful when updating software or the
operating system on your Mac.

Products Affected

Mac OS X 10.0, Mac OS X 10.1, Mac OS X 10.2, Mac OS X 10.3, Mac OS X 10.4, Mac OS X 10.5, Mac OS X 10.6, OS X Lion

Finding your Mac OS X version and build number

From the Apple () menu, choose About This Mac.


The About This Mac window appears, showing your OS X version number.

In the above example, the version is 10.7 (OS X Lion).

To see the OS X build version, click the word “Version” in the About
This Mac window (clicking “Version” toggles you through the version,
build, and serial number information for your Mac).

The build number depends on the version of the OS X operating system
that you have installed. When you install an OS X system software
update, you get a new build number. The build number of OS X that ships with a Mac may be different than what appears below.

You can also access the OS X version and build number from System Information. In the About This Mac window, click More Info to view this information in the System Information dialog box.

OS X Lion, Mac OS X 10.6.x, 10.5.8

Software Update Build Numbers
OS X Lion v10.7.3 Build 11D50 or 11D50b
OS X Lion v10.7.2 Build 11C74
OS X Lion v10.7.1 Build 11B26 or 11B2118 (see note)
OS X Lion v10.7 Build 11A511
Mac OS X v10.6.8 Build 10K540 or 10K549
Mac OS X v10.6.7 Build 10J869 or 10J3250
Mac OS X v10.6.6 Build 10J567
Mac OS X v10.6.5 Build 10H574 or 10H575
Mac OS X v10.6.4 Build 10F569 or 10F616
Mac OS X v10.6.3 Build 10D573 or 10D578

Note: Build 11B2118 is available only on the Mac mini (Mid 2011), Mac mini Server (Mid 2011), and MacBook Air (Mid 2011).

Retail installation discs

Retail Disc Build Numbers
Mac OS X v10.6.3 Install DVD Build 10D575
Mac OS X v10.6 Snow Leopard Install DVD Build 10A432, build 10A433 for Server
Mac OS X v10.5.6 Install DVD Build 9G66
Mac OS X v10.5.4 Install DVD Build 9E25
Mac OS X v10.5 Leopard Install DVD Build 9A581

Mac OS X v10.5 and earlier builds

About This Mac “Build” Information
Mac OS X v10.5.8 Build 9L30, or 9L34 for Server 10.5.8 v1.1
Mac OS X v10.4.11 Build 8S165
Mac OS X v10.4 Tiger installation disc Build 8A428
Mac OS X v10.3.9 Build 7W98
Mac OS X v10.3.2 installation disc Build 7D28
Mac OS X v10.3 Panther installation disc Build 7B85
Mac OS X v10.2.8 Build 6R65 or 6R73
Mac OS X v10.2.3 installation disc Build 6G37, 6G35 for Server
Mac OS X v10.2 Jaguar installation disc Build 6C115
Mac OS X v10.1.5 Build 5S60 (5S66 with Networking Update 1.0)
Mac OS X v10.1 Puma installation disc Build 5G64 (5L14 or 5L17b with Security Update 10-19-01)
Mac OS X v10.0 Cheetah installation disc Build 4K78

Additional Information

You should always use the latest version of OS X. You can get
updates from the Software Update pane of System Preferences, or from Apple Support Downloads. To find build numbers for specific Mac computers, refer to OS X versions (builds) for computers.


Written by davidanders

February 28, 2012 at 11:21 pm

Posted in backup

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