Sent by Luc
Editor: Try installing Should I Sleep, a OS X system extension which uses the computer's built-in webcam and microphone to determine whether you're still there, preventing the machine from going into sleep mode. If the computer "sees" your face or hears noise, the system continues operating. If nobody is in front of the computer, the machine will go into sleep mode as normal.
• Have a question for our community? Send us yours with a photo or two attached (questions with photos get answered first).