Mac OS X Versions (Builds) Supported By Various Intel Mac Models

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Apple Support has posted a handy resource explaining which Mac OS X versions (builds) originally shipped with or are available for your computer via retail discs, downloads, or Software Update.

Apple notes that some computers shipped with different Mac OS X versions at different times. When a computer is not bundled with a later version, a “-” appears in the “Later Mac OS X included” column.
The build information is available in the About This Mac window when you click the word “Version”.

Some Macs may include a slightly later build version (but same numbered version) of Mac OS X on the Install or Restore discs than was preinstalled on your computer.

Apple warns against using a Mac OS X version earlier than the one included with the computer.

If you’re using the Recovery Disk Assistant, you can only use the external recovery drive with the computer that created it.

You can check it out at:
http://support.apple.com/kb/HT1159

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