Enable Dark Mode in OS X Yosemite Beta with a defaults CommandEnable Dark Mode in OS X Yosemite Beta with a defaults Command Mac users running OS X Yosemite Beta 2 can get a glimpse at the upcoming “dark mode” feature that was mentioned briefly during the Yosemite overview presentation during WWDC 2014. Essentially, dark mode turns many user interface elements of OS X Yosemite into significantly darker variations of themselves, swapping out whites and light
