[twoodfin]

I have one of the original (SSD even!) Macbook Airs from early 2008 that isn't supported past 10.7.

I know it's a notoriously underpowered machine, but it still would have been nice to get more than 4.5 years of supported OS updates. Still perfectly functional as a portable secondary machine for mail, notes, terminal and light Chrome browsing.

Apparently they didn't want to continue to support 32-bit EFI.

[bsimpson]

Incidentally, Google is promising Chrome releases for 5 years from shipping for each Chromebook.