Knowledge base

Mac OS X: 64-bit kernel frequently asked questions

Posted in Apple Portable Computers

Summary

Learn about the 64-bit kernel on Mac OS X and its default configuration on some Macintosh models.

Products Affected

MacBook Pro (17-inch, Early 2011), MacBook Pro (15-inch, Early 2011), MacBook Pro (13-inch, Early 2011), Mac Pro (Mid 2010)

How do I tell if I'm using the 64-bit kernel?

Use the System Profiler to determine if you're running a 64-bit kernel.

  1. From the Apple (?) menu, choose About this Mac, then click More Info.