KeepingYouAwake is a small menu bar utility for macOS Yosemite (Version 10.10) and newer that can prevent your Mac from entering sleep mode for a predefined duration or as long as it is activated.
- Keeps your Mac from falling asleep.
- Works on newer versions of macOS.
- Has retina icons to blend well with other elements on a retina Mac.
- Free and open source.