If you’re not particularly pleased with the way the Mac green maximize button behaves now, you can actually change it back to a true maximize and minimize button again by using BetterTouchTool to modify the green button as discussed here. Just be sure to move your mouse cursor near the top of a full screen app to access the buttons. Now, the green button sends apps into Full Screen Mode in Mac OS X Yosemite, and the green button will also get apps out of Full Screen Mode in Mac OS X Yosemite. In prior versions of Mac OS X, you used to hover your cursor over into the upper right corner to find the exit full screen button, but now that’s part of the green button on the opposite side of the screen. The big difference between how this works now versus how it worked in prior versions of Mac OS X is where the exit button is. Click on the newly visible green button in the upper left corner to exit out of Full Screen Mode.When in full screen mode, hover your mouse cursor near the very top of the Mac screen until the menu bar and window bar displays.What seems to confuse a lot of Mac users is just how to find that green button once an app is sent into full screen where the window titlebar disappears. Since the green maximize button got you into full screen mode, you can also use that green maximize button to leave full screen mode. Exit out of Full Screen Mode in Mac OS X with the Green Button Now that you’re in full screen mode, this is where some confusion remains some users aren’t aware they got into full screen mode this way, and the next obvious question is, how do you get out of full screen mode? No sweat, it’s just as easy as you’ll see next. If you click on that button, you’ll see a transition animation and be in full screen mode, and the window titlebar disappears. The green maximize button in the upper left corner of a Mac window will enter that window or application into full screen mode. Entering Full Screen Mode in Mac OS X with the Green Maximize Button It turns out that you can enter or either exit Full Screened mode with a click of that same green button, or by using a keystroke. The good news is that both entering and exiting out of Full Screen Mode in any Mac app in macOS High Sierra, MacOS Sierra, Mac OS X El Capitan or Yosemite is really easy, and if you do find yourself in this situation don’t feel dumb, because some very techy folks have stumbled into the same situation.

How to escape full screen mode in mc