Yeah I get that, but is there a way to configure "If my Mac is idle for 30 minutes, go to sleep"? Because I don't see a setting anywhere to configure that.
On the iMac, the Energy Saver preference pane has an option
Prevent computer from sleeping automatically when the display is off. I would assume that when unchecked, the computer will sleep at the same time as the display - therefore the display sleep time is equivalent to the computer sleep time. This is different from my Mac mini, which has separate sliders for display and computer sleep.
I have not tested this because I keep my computer running 24/7, and therefore have the above option checked. Can anyone confirm that when unchecked, the computer sleeps at the same time as the display?