To change the Mac screen resolution, click the Apple menu → click System Preferences → click Display → click the Scaled option → select the resolution or display scale you want to use. This article is for the English-language Mac operating system.
Step
Part 1 of 2: Changing the Resolution

Step 1. Click the Apple menu
It's in the upper-left corner of the screen.

Step 2. Click System Preferences

Step 3. Click the Display option
If you don't see this option, click the Show All button at the top of the System Preferences window.

Step 4. Click the Scaled button

Step 5. Double-click the resolution option you want to use
Selecting the “Larger text” option has the same effect as choosing a low resolution. Selecting the “More space” option has the same effect as selecting a high resolution.
Part 2 of 2: Opening Apps in Low Resolution Mode

Step 1. Close the application when it is already open
Close the application by clicking on the application name in the menu bar and selecting Quit.
You may have to enable Low Resolution mode to run applications that display incorrectly on the Retina display

Step 2. Click the desktop
By doing this, the Finder will be active.

Step 3. Click the Go menu button

Step 4. Click Applications

Step 5. Click the application to be highlighted

Step 6. Click the File menu

Step 7. Click Get Info

Step 8. Click the Open in Low Resolution box

Step 9. Close the Get Info box

Step 10. Double-click the icon of the app you want to open
The application will open in Low Resolution mode.