System Preferences, the application for OS X that allows you to modify various system settings. The application is organized into different preference panes.

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How to stop screen from dimming when watching video?

After a while being inactive with the mouse or keyboard, the macbook will dim my screen to save battery. I know I can expand the delay before it will dim in the system preferences, but are there any ...
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Find and Change system shortcut

As I know you can find a limit of shortcut in system preference > Keyboard > Keyboard Shortcut where you can find other shortcut and how must change it? for example if I change the cmd + O to enter ...