How to Adjust Brightness on an iMac

By KR Knowlin

Apple computers offer a variety of resolution and color options so you can customize your workspace as you see fit. The iMac is Apple's all-in-one desktop computer, and though it has no exterior display control buttons, you can still edit brightness settings easily. Adjust your iMac's display from your "System Preferences."

Step 1

Open System Preferences.

Step 2

Click on the "Displays" icon under the hardware section.

Step 3

Adjust the brightness by clicking on the slider. Move the slider to the right to brighten the display. Move the slider left to darken the display.

Step 4

Click the "Close" button in the top-left corner of the window to close dialogue box.