One day after reporting is Q3 earnings, Apple launched its latest version of its Mac operating system, Mountain Lion.
Owners of older Mac hardware older will be left out, however. The models that will run Mountain Lion are the 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). (Not surprisingly, my old 2001 MacBook Pro, which is functioning fine, is not eligible.)
Apple also released version 6 of Safari, which like Google's Chrome browser, now merges the search field with the URL field. Newly updated versions of iWork, iPhoto and iMovie can also be found though Software Update.
If you're wondering if should bother to upgrade, maybe Apple's video will help you decide (see below). For an epic review of Mountain Lion and its new features, John Siracusa's review at Ars Technica is certainly complete (as well as a test of endurance).
For me, I'll wait until the first reports come in to make sure I know what I can expect to encounter in the update.