In probably the most welcome Mavericks announcement at the October event, Apple stated that it was going to "revolutionize pricing" by offering the newest version of Mac OS X as a free update for current and past Mac users. Even if you've got an iMac from 2007 (running Snow Leopard), Apple claims you'll be able to run and benefit from OS X 10.9 Mavericks.
A lot like Safari, the Finder in OS X will feature tabbed browsing. To add a new tab, click the plus symbol button, and you can drag and drop tabs in other windows.
Users can tag files with certain labels such as "Personal" and "Work" to make searching for files easier. These tags show up in Finder's sidebar.
The new OS X supports menus across multiple displays. You can summon the Dock, and when you enter full-screen, other displays are left untouched. You can also pan between spaces on each display without messing with the others.
Safari's home page for top sites will include bookmarks, a reading list, and shared links. You'll now be able to rearrange your Top Sites, and you can drag and drop a bookmark from the sidebar to keep a favorite site handy.
Safari features a new sidebar, which includes a reading list and bookmarks as well as social-media sites such as Twitter and LinkedIn.
Safari Reader can load up the next article when you get to the bottom of the one you just finished, and you can jump to articles within Reader alone.
iCloud Keychain generates Web site log-ins, credit card numbers, account information, and Wi-Fi passwords.
There's a new look for "month view" for the Calendar app that goes along with the new "flat" design aesthetic.
The Maps app has come to the Mac and it's much like the iOS version. Users will get 3D flyover, POI search, info cards, and turn-by-turn directions that they can sync with their iPhones.
Routes set up on the Mac can also be sent to an iPhone.
Several cities have been mapped for a complete 3D Flyover experience. In this shot is a 3D map rendering of the Eiffel Tower.
Info cards of restaurants and businesses are displayed in Maps.
With the Event Inspector in Calendar, you can get an estimate of how long it'll take you to get to your destination, and you can view a map.
iBooks also gets a face-lift. Here, users can zoom in on a plant using the trackpad.
You can also make annotations and highlight text within iBooks.