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Understanding Dark Mode in macOS 10.14 Mojave

The feature Apple is promoting most heavily with macOS 10.14 Mojave is Dark mode, which the company advertises as “a dramatic new look that helps you focus on your work… as toolbars and menus recede into the background.” Let’s look at what Apple has done with Dark mode, after which you’ll have a better idea of what to think about while trying it.

Enable Dark Mode

First, to turn Dark mode on, go to System Preferences > General and click the Dark thumbnail to the right of Appearance. Mojave immediately switches to Dark mode, turning light backgrounds dark and swapping the text color from dark to light.

While you’re in System Preferences, click over to the Desktop & Screen Saver preference pane. If you scroll down in the Desktop Pictures list, you’ll discover a bunch of new wallpapers that blend well with Dark mode.

Dark Mode Support and Controls

You’ll notice that the color change takes place instantly not just in the Finder, but also in any apps that support Dark mode. Most of Apple’s apps support Dark mode and third-party developers are rapidly adding support to their apps as well. However, Dark mode requires explicit support from apps, so older apps that aren’t being updated will maintain their standard dark-on-light color schemes.

Some apps, such as Maps and Mail, give you additional options that change just how dark they get. In Maps, choose View > Use Dark Map to toggle between a dark map style and the familiar map style that mimics a paper map. Similarly, in Mail, go to Mail > Preferences > Viewing and deselect “Use dark backgrounds for messages” to return to a white background.

If you generally like Dark mode but have trouble reading light text on a dark background due to the reduced contrast, you may be able to choose a different font or style in the app’s preferences that makes the text more readable. Apps like Mail give you a fair amount of that sort of control.

For even more control over contrast, open System Preferences > Accessibility > Display. There you’ll find a Display Contrast slider that lets you make text lighter and backgrounds darker. You can also select Reduce Transparency to make it so items like the Dock and menu bar are solid colors, rather than allowing the background to bleed through. To separate dark and light further, select Increase Contrast, which increases the brightness of divider lines as well.

The Dark Side of Dark Mode

Contrast is necessary for pulling out fine details, but too much contrast can be uncomfortable or even painful—think about how you feel when someone turns on a bright light in a previously dark room. For visual comfort, it’s usually best to match your screen with the lighting of your surroundings. That’s why people who often work at night or with the window blinds down like dark modes—a bright screen seems brighter in a dimly lit room. That’s the theory behind the traditional dark text on a light background too, since the room will be quite light during the day.

So Dark mode can run into two problems. First is that using it during the day or in a brightly lit room may create an uncomfortable contrast between the screen and its surroundings. Controlling your room lighting can eliminate this as an issue. Second and more troubling, even apps that support Dark mode may have large content areas that are bright white, creating a strong contrast between the content area and the rest of the app. Many Web sites in Safari have this effect, as do documents in apps like Pages and Numbers. There’s no way around this scenario.

Even if Dark mode isn’t perfect, it’s worth a try if you have trouble looking at bright screens. Regardless, if it goes too far for you, one of the new dark wallpapers may be easier on your eyes. While most people aren’t overly light sensitive, a non-trivial percentage of the population is, particularly those who suffer from migraines or who have endured concussions, and those with a variety of ocular conditions. And if you’re on the other end of the spectrum—if Dark mode looks dirty and is hard to read—just stick with the traditional Light mode.


Social Media: Apple is promoting macOS 10.14 Mojave’s new Dark mode heavily. Read on to learn if it might be for you, how you can tweak its contrast settings, and what problems you might encounter.

Tired of PDFs or Other Documents Opening in the Wrong App?

When you double-click a document, macOS uses the document’s file extension to figure out which app should open the file. So, by default, a PDF file called laser-squid.pdf opens in Preview because the Finder knows that everything with a .pdf extension should open in Preview. But what if you would prefer to open .pdf files in Adobe Reader, or you want comma-separated value (.csv) text files to open in Numbers? To change any mapping, select a file of the type in question and choose File > Get Info to open the Info window. In the Open With section, click the pop-up menu to choose the desired app and then click the Change All button.

A Hidden Trick that Lets You Navigate Your iPhone with One Hand

Unless you can palm a basketball, you may not be able to use an iPhone single-handed. But sometimes one hand is all you can spare. If you find yourself in such a situation, give Reachability a try. On a Touch ID–based iPhone, tap (don’t press) the Home button twice to slide the iPhone’s interface halfway down the physical screen, bringing everything into reach of your thumb. On the Face ID–equipped iPhone X, put your thumb in the bottom of the screen—about at the top edge of the Dock if you were on the Home screen—and swipe down. You can use apps normally for a tap or two, and then they’ll expand back to the full screen to show the full interface. If Reachability is off (or if you want to turn it off), go to Settings > General > Accessibility.

Make More Space for Documents by Putting Your Dock on the Side of Your Mac’s Screen

By default, Apple locates the Dock at the bottom of the Mac’s screen. If that location interferes with you seeing as much of your document windows as you’d like, you can set it to appear only when you move the pointer to the bottom edge of the screen. But there’s a better way: put the Dock on the side of the screen where there’s plenty of horizontal room and it won’t get in the way of most document windows. Open System Preferences > Dock, and select Right or Left from the Position on Screen radio buttons.

 

Tired of “Sent from my iPhone” as Your Email Signature?

When you use Apple’s Mail app on your iPhone to send email, the default signature is “Sent from my iPhone.” If you’d rather not advertise that fact with every email, or would prefer to change it to something more personal, don’t bother poking around in the Mail app itself. Instead, go to Settings > Mail > Signature, where you can change the signature to anything you like or delete it entirely. If you have multiple email accounts configured, such as one for work and one for home, you can also set a different signature for each.

Wondering Where Your Past Events in the iOS Calendar App Have Gone?

When it comes to calendars, we’re mostly concerned with the future. But sometimes you want to travel back in time too, to see when you had that doctor appointment or last went to the gym. If you scroll back in the Calendar app in iOS, you might discover, to your consternation, that after 2 weeks back, the only items in your calendar are old repeating events. What gives? Weirdly, since calendar events consume almost no storage space, iOS lets you select how far back to sync events from your master calendar. Choose a time period in Settings > Calendar > Sync, or to eliminate any possibility of confusion, just select All Events.

View Notes in Their Own Windows, and Float Them Over Everything Else

Here’s one for those who use Apple’s Notes app for storing bits of information. By default, Notes in macOS gives you a single window, with each note listed in a sidebar. But what if you want to see two notes at once? Or keep one always available no matter what else you’re doing? Select the desired notes in the sidebar by Command-clicking them, and then choose Window > Float Selected Notes to open them in their own windows. Or, just double-click them in the sidebar! Then, to make sure one or more of those windows is never obscured by another app, make it active and then choose Window > Float on Top. It’s still a normal window that you can move and resize and close, but no other app will appear over it. See how Safari is the frontmost app below, but the Notes window is on top?

Trading Faces: Picking a Better Face for People Photos Recognizes

Apple’s Photos app is remarkably good at identifying people in your snapshots and collecting all the pictures that contain a particular person into a group in its People view. At its top level, the People view shows a thumbnail photo for each person, picking one automatically from all the available photos. Needless to say, it doesn’t always pick the photo you want, so if you dislike what’s there, you can change it easily on the Mac. In Photos, click People in the sidebar and double-click the thumbnail of the person you want to change. If necessary, click Show More to see all their photos, then Control-click the desired photo and choose Make Key Photo from the contextual menu.