Yosemite will be available later in the year for free
Apple will be keeping up the decision that they made with Mavericks and offer a free OS X upgrade later on in the year, one that will also change a lot more than previous upgrades did. The first thing that has been given a complete makeover is the design.
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The appearance is now much more “flat” and modern looking, and even comes with a different font, something that Apple hasn’t changed in many years. The flat design ditches the shadows and fancy icons that were used before, instead focusing on a clean look that fits perfectly with the kind of style that Apple has become famous for.
There is also the notification bar, which is being made to more closely resemble that of iOS, while also working to move away from the widgets that are rarely used by MacBook users. The new notifications are going to make keeping tabs on dates, news, updates, and more simpler than ever, saving on desktop space, time, and effort, three things that Apple is always working diligently on.
The update doesn’t have an official release date yet, but it is going to be seeding to developers and those in the beta testing program soon.
Source: Apple Balla