I haven't found a way to get the app to work while my Mac is sleeping. I don't want to prevent my Mac from sleeping and I don't want to continually shake the mouse or something like that. Any ideas?
try this app – https://itunes.apple.com/en/app/caffeine/id411246225?mt=12 (alternative url – http://lightheadsw.com/caffeine/)
or something like this (in terminal):
caffeinate -t 3600 &
3600 <- time in seconds = 1 hour in this case
http://osxdaily.com/2012/08/03/disable-sleep-mac-caffeinate-command/