MacBook Pro

If the computer has at least 1GB of RAM, it can be upgraded to Mac OS X 10.6.3 and then 10.6.8. MacBook Pros with a Core 2 Duo(not Core Duo) or better CPU can be upgraded further, but going through Mac OS X 10.6.8 is needed to do so.

You don't need to buy a new computer, as any MacBook Pro model released in the last 5 years with sufficient RAM can run 10.8.3.

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OS X Mountain Lion system requirements

To install Mountain Lion, you need one of these Macs:

• iMac (Mid 2007 or newer)
• MacBook (Late 2008 Aluminum, or Early 2009 or newer)
• MacBook Pro (Mid/Late 2007 or newer)
• MacBook Air (Late 2008 or newer)
• Mac mini (Early 2009 or newer)
• Mac Pro (Early 2008 or newer)
• Xserve (Early 2009)

Your Mac needs:

• OS X v10.6.8 or OS X Lion already installed
• 2 GB or more of memory
• 8 GB or more of available space

If your macbook pro doesn't meet the above requirements - see the requirements for Lion.

OS X Lion system requirements

To use Lion, make sure your computer has the following:

• An Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
• Mac OS X v10.6.6 or later to install via the Mac App Store (v10.6.8 recommended); you can install without Mac OS X v10.6 by using an OS X Lion USB Thumb Drive, available on the Apple Online Store
• 7 GB of available disk space
• 2 GB of RAM