Lion or Mountain Lion?
You should be able to. This is for Mountain Lion. Lion link below.
- iMac (Mid 2007 or newer) model number 7,1 or higher
- MacBook (Late 2008 Aluminum, or Early 2009 or newer) model number 5,1 or higher
- MacBook Pro (Mid/Late 2007 or newer) model number 3,1 or higher
- MacBook Air (Late 2008 or newer) model number 2,1 or higher
- Mac mini (Early 2009 or newer) model number 3,1 or higher
- Mac Pro (Early 2008 or newer) model number 3,1 or higher
- Xserve (Early 2009) model number 3,1 or higher
Your Mac needs:
- OS X v10.6.8 or OS X Lion already installed
- 2 GB or more of memory (More is better)
- 8 GB or more of available space
Check to make sure your applications are compatible. PowerPC applications are no longer supported.
You can also check by going to the menu, select About this Mac, click on More info…, then click System Report and select Software/Applications.
If you have applications that you want to use that aren’t compatible, you can retain Snow Leopard and create a new partition to install Mountain Lion on or you can run Snow Leopard server in a virtual mode.
If your computer isn't compatible, you might be able to upgrade to Lion.
If you can/do upgrade, I recommend you make a copy of the installer and move it out of your Applications folder. The installer self-destructs. The copy will keep you from having to download the installer again. You can make a bootable DVD/USB stick to install using this free program.