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Mac OS X: About This Mac "build" information
The Wayback Machine - https://web.archive.org/web/20100524170611/http://support.apple.com:80/kb/ht1633

Mac OS X: About This Mac "build" information

  • Last Modified: April 14, 2010
  • Article: HT1633
  • Old Article: 106176

Summary

Learn about build versions, such as "Build 10D578", which appear in the About This Mac window and System Profiler (click the word "Version" in the About This Mac window to see the build number).

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

Products Affected

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

Mac OS X v10.6.3 Build 10D573 or 10D578
Mac OS X v10.6.3 Install DVD Build 10D575
Mac OS X v10.6.2 Build 10C540
Mac OS X v10.6.1 Build 10B504
Mac OS X v10.6 Snow Leopard Install DVD Build 10A432, build 10A433 for Server
Mac OS X v10.5.8 Build 9L30, or 9L34 for Server 10.5.8 v1.1
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 v10.4 and earlier builds 

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 Mac OS X. You can get updates from the Software Update pane of System Preferences, or from Apple Support Downloads.

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