This article provides instructions on how to prevent a Mac computer from automatically entering sleep mode, a feature designed to conserve power. Users can permanently disable sleep mode by navigating to System Settings > Lock Screen and setting "Turn display off" to "Never." For temporary deactivation during specific tasks, the Terminal command "caffeinate" can be used, keeping the screen on as long as the Terminal window is open. The article also details how to schedule automatic sleep times using the `pmset` command in Terminal, allowing users to maintain power-saving benefits while ensuring the Mac sleeps at designated intervals, such as overnight.