1. Command + Space
The simplest, and most common, way to speed up your Mac usage is utilize Spotlight. You can also use Spotlight as a calculator, or have it make currency conversions.
2. Command + Option + Escape
Inevitably your Mac will freeze up and force you to quit some apps. There’s no “Ctrl Alt Delete” here — instead, you hit Command + Option + Escape to shut tasks down the hard way. This is a bit faster than right-clicking on each troublesome app yourself.
3. Command + Delete
You delete files on Mac by sending them to the Trash. Many people do this by manually dragging each file to the little Trash icon. If you want to go a little faster, though, just select a file, and hit Command + Delete.
4. Command + Shift + 3/4
Taking a screenshot on Mac is just cleaner than it is on Windows. At any point, hit Command + Shift + 3 to capture the whole screen, or Command + Shift + 4 to capture a custom portion of the display.
5. QuickTime Player
Along those same lines, make use of Apple’s QuickTime Player. If you need to record whatever audio or video is playing on your screen, for instance, you don’t need to download any third-party software.
In Finder, you can rename files and photos in bulk, rather than changing each one manually. Just highlight what you need, right click, select “Rename [X] items…”, and enter your new info into the naming tool that pops up.