How the Mac quickly changes how files are opened

How does a Mac quickly change the way files are opened? Many of the apps in OS X are powerful, such as Xcode, QuickTime Player, which is the default way to open some files, but the volume is large enough. Once the computer's memory doesn't keep up, you'll see the apps jumping, jumping and jumping on the Dock ... With this, some lightweight applications have been opened long ago. So today's small to tell you how to quickly change the way to open.

First step: Select the file

Yes, you see the wrong wood, this is the first step, but also the most important step!

Step Two: Right-click on the file

Select "Show Introduction", Hotkey Command + I

Step three: Click on the "Open with" Drop-down list

Choose the "open mode" you prefer

Step Fourth: Confirm the change

Click the "Change All" button below

Click "Continue" in the pop-up dialog box

Well, that's the right way to turn it on!