I have just bought a macbook pro to replace my iMac. I have noticed that the laptop is falling asleep in the middle of downloads and uploads for instance. Is there any way of stopping this? So if I walk away from the laptop with a file downloading in Firefox I don't want the laptop to fall asleep, I want it to continue to download the file. Similarly I have scheduled online backups happening at night, well, they used to happen..... It looks like perhaps they are starting but when I start using the computer in the morning they are not complete. It looks like nothing has been uploaded. I see there is a setting to disable sleep completely but that's not really what I want either, just disable sleep when there is significant network traffic due to me uploading or downloading.