Whenever your computer displays video graphics, the machine's refresh rate plays a large part in how well those graphics display. Whether you are watching a movie or playing a game, a higher refresh rate means the computer redraws the graphics more frequently. A higher refresh rate thus means smoother playback. However, higher refresh rates also require better graphics hardware. Your MacBook Pro has a variety of refresh rate settings you can change by accessing the System Preferences menu.
Step 1
Click on the Apple logo at the top left-hand corner of your MacBook screen.
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Step 2
Click "System Preferences."
Step 3
Click on the icon marked "Displays."
Step 4
Click on the box next to the option labeled "Refresh Rate."
Step 5
Click on one of the available refresh rates in the drop-down list that appears. Close the System Preferences window when you finish.