Mac OS X: About This Mac "build" information
Summary
Learn about build versions, such as "Build 9G55", which appear in the About This Mac window and System Profiler.
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
The build version you see depends on the version of the Mac OS X operating system that you have installed. When you install a Mac OS X software update, you get a new build version. The original version that came with your PowerPC- or Intel-based Mac may be different and is listed in the linked articles.
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About This Mac "Build" Information
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| Mac OS X 10.0 Cheetah | Build 4K78 |
| Mac OS X 10.1 Puma | Build 5G64 (5L14 or 5L17b with Security Update 10-19-01) |
| Mac OS X 10.1.5 | Build 5S60 (5S66 with Networking Update 1.0) |
| Mac OS X 10.2 Jaguar | Build 6C115 |
| Mac OS X 10.2.3 retail CD (with "10.2.3" imprinted) | Build 6G37, 6G35 for Server |
| Mac OS X 10.2.8 | Build 6R65 or 6R73 |
| Mac OS X 10.3 Panther | Build 7B85 |
| Mac OS X 10.3.2 retail CD | Build 7D28 |
| Mac OS X 10.3.9 | Build 7W98 |
| Mac OS X 10.4 Tiger | Build 8A428 |
| Mac OS X 10.4.9 | Build 8P135 |
| Mac OS X 10.4.10 | Build 8R218 |
| Mac OS X 10.4.11 | Build 8S165 |
| Mac OS X 10.5 Leopard | Build 9A581 |
| Mac OS X 10.5.1 | Build 9B18 |
| Mac OS X 10.5.2 | Build 9C31, 9C7010 |
| Mac OS X 10.5.3 | Build 9D34 |
| Mac OS X 10.5.4 | Build 9E17, or 9E25 from Mac OS X 10.5.4 Install DVD |
| Mac OS X 10.5.5 | Build 9F33 |
| Mac OS X 10.5.6 | Build 9G55, or 9G66 from Mac OS X 10.5.6 Install DVD |
| Mac OS X 10.5.7 | Build 9J61 |
Notes
- You should always use the latest version of Mac OS X. Updates are available in the Software Update pane of System Preferences and at Apple Downloads http://www.apple.com/swupdates/.
- In Mac OS X 10.1 and later, click the word "Version" in the About This Mac window to reveal the build number.
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