Completely disable sleep on any Mac

nosleep.sh

# Useful to prevent Macbooks to go to sleep when closing the lid instead of running tools that requires a Kernel Extension (e.g. InsomniaX) and more
sudo pmset -a sleep 0; sudo pmset -a hibernatemode 0; sudo pmset -a disablesleep 1;

# And to go back to normal (for Macbook):
sudo pmset -a sleep 1; sudo pmset -a hibernatemode 3; sudo pmset -a disablesleep 0;

# If you have desktop, to go back to normal run this: sudo pmset -a sleep 1; sudo pmset -a hibernatemode 25; sudo pmset -a disablesleep 0;