Everyone is talking about Mountain Lion, the new operating system that Apple announced today and will begin shipping this summer. Mountain Lion has some cool new features, like iMessage compatibility, deep Twitter/social integration, Notification Center and more, but not all current Mac users will be coming along for the ride.

According to MacGeneration (en francais), there are few older Macs that won't be able to support Mountain Lion, even though they're currently Lion compatible. The upcoming OS apparently won't work with the older Intel chip sets found in the following Macs:

- Any Intel Core 2 Duo MacBook from late 2007 – late 2008 (Model Numbers: MB061*/B, MB062*/B, MB063*/B, MB402*/A MB403*/A MB404*/A, MB402*/B)
- The Mid-2007 Mac mini (Model Numbers: MB138*/A, MB139*/A)
- Late 2006 polycarbonate iMac (Model Number: MA710xx/A)
- The original early 2008 MacBook Air (Model Number: MB003LL/A)

If any of those are you, this is the end of the road. But look at it this way: You officially have an excuse to get a new computer.

[via Gizmodo]