And a few tweaks for good measure: By default Yosemite presents an interface with more transparent elements — windows in addition to the transparent menu bar that we've seen in the past. If you prefer that Yosemite's mien be more opaque, launch System Preferences, select Accessibility, choose Display, and enable the Reduce Transparency option. This same Display preference offers additional options for increasing contrast.
And if you still find OS X's "natural" scrolling direction unnatural, you can reverse it by going to Mouse (if you use such a thing) or Trackpad (for trackpad users) preferences and disabling the Scroll direction: natural options.
Familiarize yourself with Yosemite's new features
And now your explorations begin. Yosemite has a lot to offer, including Spotlight and Notification Center improvements, Continuity and Handoff, iCloud Drive, and more. For that more keep an eye on Macworld.com — we've got you covered.
Sign up for Computerworld eNewsletters.