Apple's new operating system for Macs, called OS X Yosemite, is now available for the public to test-drive. Yosemite represents a bold visual redesign, but one that still feels rooted in the familiar simplicity that Mac users have grown to love. The result is a cleaner, more vibrant operating system that takes a few design cues from Apple's mobile operating system, iOS.When you boot up Yosemite for the first time, you're greeted by the Feedback Assistant, which is how you can report any bugs to Apple.