06/06/2011 05:38 pm ET Updated Aug 06, 2011

Mac OS X Lion: 9 Things You Need To Know About Apple's Newest Operating System (PHOTOS)

During Monday's WWDC keynote address, Apple previewed a nearly complete OS X Lion, the latest update of it's operating system built for Mac laptops.

While some have speculated that Lion may be the last in the OS X line, the newest iteration of the popular OS brought a host of new features, including multi-touch gestures and an impressive auto-save feature that could make the "I was almost done but I forgot to save" excuse all but irrelevant.

But are they enough to get you to upgrade?

Check out our slideshow for some of the most crucial things you need to know about Mac OS X Lion, including new features, when to get it and how much it will cost you.