Jul 12, 2017 How to Adjust Brightness Manually on a Mac. You’ll find brightness-adjusting keys on your Mac keyboard, whether you’re using a MacBook or a Mac desktop with an Apple keyboard. On a MacBook, look at the top-left corner of your keyboard. How To: Lower Screen Brightness on Your Mac Below the Default How To: Get CyanogenMod's. There is an app in the task bar called Tobii Eye. You will need to open the application by right clicking on the icon and then click on open. Go into the settings and turn off the Dim Brightness.
Boot Camp Control Panel User Guide
You can change the brightness of your built-in display and your Apple Cinema Display.
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You can adjust your display’s brightness in Windows or with the brightness keys on your Apple keyboard. You may need to hold down the Fn key as you press the brightness keys. For information about configuring the Fn key, see Use Windows keys on a Mac keyboard.
Change your Apple Cinema Display settings
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In Windows on your Mac, click in the right side of the taskbar, click the Boot Camp icon , then choose Boot Camp Control Panel.
If a User Account Control dialog appears, click Yes.
Click Cinema Display.
You can choose what happens when you press the display’s power button and the brightness buttons.
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Change your display’s brightness in Windows 10
In Windows on your Mac, click the Start button, choose Settings, then click System.
In the list on the left, click Display.
Set brightness options as desired.