![]() ![]() If you are new to macOS Catalina 10.15 and later you might need to learn a few things like how to back up an iPhone or iPad, for example. This guide is based on macOS Catalina and the latest and greatest versions of macOS at the time of writing. Apart from saving money, turning your display off when not being used will hopefully make it last longer and the same definitely goes for things like spinning hard disks, too. ![]() Making use of energy-saving options is still a good idea even if you’re using a Mac that is always plugged in. ![]() It’s great for those with flakey power but also need their computer to be on 24/7. “ Start up automatically after a power failure” – This instructs your Mac to automatically power back on once power is restored if it wasn’t correctly shut down. The display won’t be turned on when this happens and Power Nap only wakes a computer if it is plugged in, too. “ Enable Power Nap” – Power Nap allows your Mac to be woken from sleep to carry out some functions, like running a Time Machine backup or sending and receiving email. “ Wake for network access” – Most people will not need this, but if you have a media library or other shared resource – like a printer – this checkbox enables another computer to wake your Mac up if it’s needed. That isn’t really the case anymore, but if you’re using an external hard disk or have a Mac Pro with internal spinning disks, this option will turn them off when they aren’t being used. “ Put hard disks to sleep when possible” – This option is left over from when all Macs had spinning hard disks in them. This is limited to Mac laptops, of course. “ Slightly dim the display on battery power” – This will automatically reduce display brightness when the Mac is running on battery power. “ Prevent the display from sleeping automatically when the display is off” – This is a way to ensure your Mac stays powered on and awake, even if your Mac puts its display to sleep. You can wake it up by pressing a key on the keyboard or by moving the mouse. If you’re using an external display it will likely enter low-power mode. If that’s an internal display it will be turned off completely. “ Turn the display off after” – This tells your Mac when to turn off the display. Now let’s take a look at the options and what they do. We’ll also run through what all the options do. With that said, here is generally what a Mac’s energy-saving options look like, the screenshot is from a desktop Mac, but further below you’ll see a screenshot for a Mac laptop. Notably, you’ll have two panes – one will be for when your computer is running on battery, the other for when it’s on power. The screenshot was taken on a 2018 MacBook Air, and the other on a 2018 Mac mini, but if you’re using a MacBook, MacBook Pro, or MacBook Air you’ll see different settings for battery power. If you see inaccuracies in our content, please report the mistake via this form.All of these settings live in the Energy Saver area of your Mac’s Preferences app, and the options you see will vary depending on what computer you are using. If we have made an error or published misleading information, we will correct or clarify the article. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. ZDNET's editorial team writes on behalf of you, our reader. Indeed, we follow strict guidelines that ensure our editorial content is never influenced by advertisers. ![]() Neither ZDNET nor the author are compensated for these independent reviews. This helps support our work, but does not affect what we cover or how, and it does not affect the price you pay. When you click through from our site to a retailer and buy a product or service, we may earn affiliate commissions. And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing. We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. ZDNET's recommendations are based on many hours of testing, research, and comparison shopping. ![]()
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