SleepLess AlternativesPrevent Sleep Mode Apps like SleepLess

Amphetamine is a little app that lives in your menu bar which can effortlessly override your energy saver settings and keep your Mac awake.

NeverNap prevents your Mac from sleeping or activating the screensaver. For 5 minutes or indefinitely. Perfect for presentations or long processes.

Caffeine is a tiny program that puts an icon in the right side of your menu bar. Click it to prevent your Mac from automatically going to sleep, dimming the screen or starting screen savers.

This is a simple app that prevents the desktop environment (DE) from sleeping while its on. It should work regardless of the used DE thanks to the Inhibit portal.

Use Mac with external monitors with lid closed even when you are on battery power. Play music, airplay movies, download/upload lid closed. Most modern and up to date app.

Don't Sleep is a small portable program to prevent system shutdown, Standby, Hibernate, Turn Off and Restart.

Keeps your Mac awake.

Annoyed by the display getting dim when you're reading or watching something? What if the computer could “see and hear” you?

Coffee allows you to keep the display awake without having to change the device settings. It can be toggled at various places:

Clapet is a utility that aims to improve clamshell mode on your Macbook by automatically managing sleep when an external display is detected.

Econap helps you to save energy and increase your comfort. Before your pc enters the sleep mode, Econap will check if something important is running on your system. If so, it will wait until your download, backups, videos etc. are finished. Finally your pc will go to sleep.

It always has been a missing feature: disabling the sleep mode on a Apple Laptop. Who does not want to use it as a big juke-box or go warwalking. The best looking server ever, especially at about one inch height.