![]() That 5.7 kWh also adds only about 5.68 lbs of CO2 to the atmosphere per year. At the current average residential electricity rate in my part of the country (12.04 cents per kWh), turning off that Mac each night would only save me about $0.69 per year. 98 W, meaning that over a year, I’m using an additional 5.7 kWh (kilowatt-hours) of power (assuming I actively use the Mac eight hours per day). The difference in power consumption between sleeping the Mac and turning it off is only. Turning the Mac all the way off, but keeping it plugged in, power use goes down to 0.24W. Put that iMac to sleep, and it uses only 1.22 W of power. When it is idle (that is, not actively performing any tasks) and the display is turned on, it uses 69.1W of power. I use a 27-inch iMac with a Retina 5K Display as my primary computer. Near the bottom of this page, you can find environmental reports for every product Apple has made since 2009, and that information includes just how much power your device consumes. ![]() You can find out exactly how much power your Mac uses by visiting the Apple Product Environmental Report page. Well, it turns out that your Mac uses energy even when it is plugged in and turned off! If you’re energy-conscious, you might be wondering if you’re wasting power by putting your Mac in Power Nap mode instead of turning it off. Power Nap is enabled on the Energy Saver System Preference pane (Battery Pane in Big Sur)Īm I Wasting Energy or Contributing to Climate Change By Not Shutting Down My Mac? Using the mouse or trackpad to place the cursor in the Hot Corner puts the device to sleep. In the screenshot below, Put Display to Sleep has been selected for the lower right corner of the screen. Click it and a diagram showing the four corners of the primary display appears - each corner can have something assigned to it. In the lower right corner of the preference pane is a button for Hot Corners. Hot Corners are defined in the Desktop & Screen Saver system preference. To make the Mac “go to sleep”, you can select “Apple menu > Sleep” from the menu bar, close the screen on a MacBook, MacBook Pro or MacBook Air, or move the cursor into what’s called a Hot Corner. Owners of any of the Macs listed above should have Power Nap enabled by default.
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