I have been collecting these awesome keystrokes for a few years. All keyboard tips & tricks below exactly work right on Mac OS X Yosemite (Mac OS 10.10) or other OS X versions. They must work on OS X El Capitan as well.
In this article, you see All Mac Keyboard Shortcuts in Yosemite or even OS X El Capitan coming. And Trust me because there are many hidden interesting things of Mac you do not know.