Prevent your Mac from entering sleep mode. Specify sleep and wake settings.

Check out these Sleep Control Apps:

Wimoweh

wimoweh
With Wimoweh you have better control over how your Mac sleeps. The app comes in handy when you’re waiting for a lengthy job to finish and want your Mac to sleep afterwards.

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Jiggler

Jiggler

When you have some lengthy task for your computer to do, it’s annoying to have to turn off your screensaver and turn off the sleep timer, only to have to turn it all back on again when you’re done. Jiggler is a freeware menu bar app that keeps your Mac awake. It’s a little helper that bumps your mouse every once in a while to keep your machine alert.

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