Keeps your Mac awake
NoSleep is an application that you use to prevent your Mac from going to sleep.
Optionally disable the screen saver also.
This app was conceived for musicians who use their Macs to read music as they play their instrument and consequently do not want their Mac to go to sleep.
What can NoSleep do for me?
It keeps your Mac awake for a given period of time. NoSleep updates system activity periodically as soon as it launches, until it is quit, or, for laptops, the battery charge level drops below a specified amount (which defaults to 10%)
As soon as you launch NoSleep it prevents your Mac from sleeping until quit, or the battery charge level drops below a specified amount .
You can schedule the time it quits so that you can leave it unattended. Do this in Preferences.
Use the Preference pane to specify quit time.
Also use the text field on the preferences window for creating a timer to quit the app at a time you can specify as a (fractional) number of minutes. The timer is created as soon as editing stops in the text field, say by tabbing out of it, and each edit resets the timer. If the value of the text field is zero no such timer is created, and any previous such timer will be removed.
Finally, in preferences you can specify a battery threshold so that NoSleep stops keeping the Mac awake at a certain level. This helps prevent the Mac from running out of energy when unplugged.
Try the demo. Fully functional.