Mountain Lion

Speaking of upgrades, the new cat is around the corner. The release Apple's Mountain Lion, OSX 10.8 is imminent and many Mac users will want to upgrade (I know I will). Do you have what it takes? You must be running OSX 10.7 (Lion) or the most recent version of Snow Leopard (OSX 10.6.8) to download Mountain Lion from the app store. And some older machines will not be compatible. Here is the official list of compatible 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)

Assuming you have the requirements necessary, here's a good article from Macworld explaining how to get your machine(s) ready:

Get Your Mac Ready For Mountain Lion