Introduced in OS X 10.8 (Mountain Lion) for select Macs, allows a sleeping Mac to:

, downloads typically stop when a computer enters sleep mode. In this low-power state, the system powers down almost everything except the RAM to save energy, meaning your network adapter and hard drive stop working. Apple Support Community +3 However, there are easy workarounds to keep your progress moving overnight. Windows PC & Laptops On Windows, you cannot "download while sleeping," so the trick is to prevent the computer from sleeping while allowing the screen to turn off. Reddit Prevent Sleep: Go to

Traditionally, Sleep Mode on Windows acts like a pause button. It cuts power to the processor and hard drive to save energy, which immediately kills any active internet connection and stops downloads.

You have two options to keep the download going while saving power: