Getting the preview is quite simple, just sing up with your Apple ID in the OS X Beta Program website. Once logged in, you’ll see the instructions to on downloading and installing the software. Like Windows 8, Mac users need to download an installer assistant, only compatible with Mac computers, of course, that will download the necessary bits to upgrade. As this is a beta software, it’s not recommended you install Yosemite in your primary machine, you can test the software on a spare machine or in a virtual machine. With OS X Yosemite version 10.10 testers will notice a big visual redesign, Apple has touch pretty much every aspect of its operating system. Users will get a more flat design that comes from iOS 7, new icons, and the new translucent user-interface that allows to view if there are things in the back. There are not just new visuals, new features are present too such as making phone calls, new Spotlight enhancements, Notification Center with customizable widgets, full screen apps, new Safari, new iTunes,  and a lot more. Source Apple All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.