Spend some time with Activity Monitor to get a sense of the energy usage of your particular installation.

Apple’s new suite of energy saving settings, App Nap — not to be confused with Power Nap — doesn’t really have an interface. Which is fine! The whole idea behind App Nap is that it runs in the background, looking for apps that fit certain criteria like whether they’re maximized or currently downloading or playing media.

That doesn’t mean App Nap can’t benefit from some occasional monitoring. The venerable app, Activity Monitor, has a new tab labeled “Energy” that lets you do just that. It lists your currently running programs and daemons, their energy usage, and whether the application is App Nappin’. If you see an app that has a disproportionate energy impact, kill it, and consider uninstalling it.

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