Mac OS X Server v10.6: Macs that use the 64-bit kernel
Summary
Learn which Macs can use the 64-bit kernel in Mac OS X Server v10.6, and which use it by default.
To learn how to switch between using the 64-bit and 32-bit kernels, see this article.
Products Affected
Xserve (Early 2008), Xserve (Early 2009), Mac OS X Server 10.6 , Mac Pro, iMac, Mac mini
Xserves
| Can use 64-bit kernel | Uses 64-bit kernel by default |
|
| Xserve (Early 2009) | √ | √ |
| Xserve (Early 2008) | √ | √ |
| Xserve (Late 2006) |
Other Macs
| Can use 64-bit kernel | Uses 64-bit kernel by default |
|
| Mac Pro (Early 2009) | √ | √ |
| Mac Pro (Early 2008) | √ |
√ |
| Mac Pro (Original) | ||
| iMac (Early 2009) | √ | |
| iMac (Early 2008) | √ | |
| iMac (earlier models) | ||
| Mac mini (all models) |
Additional Information
You can see which kernel you are using in System Profiler: Choose About This Mac from the Apple () menu, then click More Info. Select Software in the Contents pane, then look for "64-bit Kernel and Extensions: Yes (or No)" under the System Software Overview heading.
Note: A 64-bit kernel is not the same thing as a 64-bit processor.
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