If you’re running macOS 10.13.4 High Sierra or macOS 10.14 Mojave, you may have seen a dialog that says an app isn’t optimized for your Mac. The message differs slightly between High Sierra and Mojave, with the High Sierra version telling you the developer needs to update the app to improve compatibility whereas Mojave saying bluntly that the app won’t work with future versions of macOS.
What’s going on here, what should you do, and when should you do it?
What’s Going On: 32-bit and 64-bit Apps
Over a decade ago, Apple started to transition all the chips used in Macs, along with macOS itself, from a 32-bit architecture to a 64-bit architecture. Without getting into technical details, 64-bit systems and apps can access dramatically more memory and enjoy significantly faster performance.
Apple knew it would take years before most people were running 64-bit hardware and 64-bit-savvy versions of macOS, so it allowed macOS to continue running older 32-bit apps. However, maintaining that backward compatibility has a cost, in terms of both performance and testing, so at its Worldwide Developer Conference in 2017, Apple warned developers that High Sierra would be the last version of macOS to support 32-bit apps “without compromise.” At the next WWDC in June 2018, Apple announced that macOS 10.14 Mojave would be the last version of macOS to run 32-bit apps.
Happily, the only “compromise” for 32-bit apps in Mojave is the warning dialog, which appears every 30 days when you launch an older app. But the writing is on the wall: 32-bits apps will cease working in macOS 10.15.
How Do You Identify 32-bit Apps?
Apple provides a tool to help you find 32-bit apps. Follow these steps:
From the Apple menu, choose About This Mac and then click the System Report button.
In the System Information utility that opens, scroll down to Software in the sidebar and select Applications. It may take a few minutes to build the list of every app on all mounted drives.
When it finishes, click the 64-bit column header (No means 32-bit; Yes means 64-bit) to sort the list, and select an app to see its details in the bottom pane.
This technique works in both High Sierra and Mojave, but in Mojave, System Information includes a better-formatted section, called Legacy Software, that also provides a list of 32-bit apps. However, this list may be smaller because it includes only those apps that you’ve launched. Since it’s likely that you open old 32-bit apps only occasionally, you can’t trust the Legacy Software list to be complete.
If you find System Information’s Applications list overwhelming, check out the free 32-bitCheck utility from Howard Oakley. It performs exactly the same task but lets you focus on a particular folder and save the results to a text file for later reference.
What’s Your Next Step?
Once you know which apps won’t work in macOS 10.15, you can ponder your options. Luckily, you have some time. We expect Apple to release macOS 10.15 in September 2019, but you don’t need to upgrade right away—in fact, we recommend that you wait a few months after that to allow Apple time to fix bugs.
That said, we do encourage upgrading eventually, and if you buy a new Mac after September 2019, it will come with macOS 10.15. So you need to establish a plan—it’s better to know what you’re going to do than to be forced into action if you have to replace your Mac on short notice. For each 32-bit app on your Mac, you have three options:
Delete it: It’s not uncommon to have old apps that you haven’t used in years and won’t miss. There’s no need to waste drive space on them in macOS 10.15.
Upgrade it: Apps in active development will likely have a new version available. The main questions are how much the upgrade will cost and if there are compatibility issues associated with upgrading. You can upgrade at any time, although it’s likely worth waiting until you’re ready to move to macOS 10.15 to minimize costs. The apps that cause the most irritation here are things like the Adobe Creative Suite—Photoshop, Illustrator, and InDesign—that require switching to a monthly subscription.
Replace it: If no upgrade is available, the cost of upgrading is too high, or upgrading comes with other negatives, it’s time to look for an alternative. This can take some time, so it’s worth starting soon to ensure that the replacement will provide the features you need before macOS 10.15 forces the decision.
Needless to say, if you’d like recommendations about how to proceed with any particular app or workflow, get in touch with us!
Siri on the Mac hasn’t been as useful as on iOS devices, but with macOS 10.14 Mojave, Apple enhanced the Mac version of Siri in a variety of ways. Apple says that Siri now knows about food, celebrities, and motorsports, but more interesting is how you can ask Siri to control your HomeKit devices (“Turn on the bedroom lights.”) and locate your iOS devices or AirPods via Find My iPhone (“Where is my iPhone?”).
In macOS 10.14 Mojave, Apple exposed a feature of Mail that was useful, but hard to find and use. For several versions of Mail, you’ve been able to select a message and choose Message > Move To Predicted Mailbox to file the email in the suggested mailbox. (If the Move To command is disabled, Mail hasn’t yet learned how to move messages like the selected one. Once it sees you move messages from your mother into your Family mailbox, for instance, it will suggest that destination in the future.) In Mojave’s Mail, there’s also now a Move To toolbar button. If it can predict where the message will go, just click it; if not, click and hold to bring up a menu of all your mailboxes.
Desktop Stacks are a new way to reduce icon clutter in macOS Mojave 10.14. There are three types of people in this world: those who keep their Mac Desktop organized, those who don’t and don’t care, and those who don’t but wish they could. If you’re sitting on the Group #3 bench–you have oodles of icons scattered willy-nilly`around your Desktop, and it bugs the bejeebers out of you—macOS 10.14 Mojave might have the solution: Stacks.
Apple has used the term “Stack” before, and still does, in relation to how the icons of folders in the Dock display, either as normal folders or as a stack of icons with the first on top. Mojave’s new Stacks feature brings that visual approach to the Desktop, organizing icon clutter into neat stacks that you can expand and collapse with a click, working with the revealed icons just as you’ve always done.
In the Finder, the best way to invoke Stacks is by Control-clicking the Desktop and choosing Use Stacks from the contextual menu (below left). If you first click the Desktop, you can also find the commands for Stacks in the View menu: Use Stacks and Group Stacks By. Lastly, if you open the View Options window by Control-clicking the Desktop and choosing Show View Options, you can work with Stacks by choosing from the Stack By pop-up menu (below right).
Regardless, when you invoke Stacks, the Finder promptly collects all like icons—even new files, as you create them—together into one or more stacks of icons. Click once on a stack to reveal its contents below. Click again to collapse the revealed icons back into the stack. If you open multiple stacks at once, each subsequent stack takes over a spot at the top of the screen and expands down. If you don’t show disks on your Desktop, you can get a nice columnar view of what’s on your Desktop.
How does Stacks figure out which files are alike? You determine that by Control-clicking the Desktop and choosing from the Group Stacks By menu. You can create three basic types of stacks:
Kind: These stacks are named for the type of file they contain, such as Documents, PDF Documents, Movies, Images, Screenshots, etc.
Date: With date-based collections, each stack’s name and contents depend on what date ranges make sense, such as Today, Previous 7 Days, Previous 30 Days, October, 2017, and so on. The date groupings can key off the date added, last opened, last modified, or created.
Finder tags: Tag-based stacks are useful only if you regularly assign tags to all your files.
We expect that grouping stacks by kind will work best for most people, with a few chronologically inclined folks opting for one of the date options.
How can you control the order of the files within a stack? That’s trickier. Control-click the Desktop, choose Show View Options, and in the View Options window, choose from the Sort By pop-up menu. We’re partial to Name (for an alphabetical list) and Last Modified (to put the most recent file you’ve touched on top), but see what works for you.
The main problem with Stacks is that it eliminates any spatial memorization you might have relied on to find icons on your Desktop. You might be able to identify the document you’re looking for by its icon, but exactly where that icon appears when you expand its stack depends on what other stacks are open or closed, what other files are in the stack, and how the stack is sorted. So if your Desktop is a mess, but you know to look in the lower-left corner for the files you’re working with, Stacks may irritate you.
Luckily, you can give Stacks a try without permanently rearranging your Desktop. Just invoke it—the Command-Control-0 (zero) keyboard shortcut can be handy here—and try Stacks. If you don’t like it, another press on Command-Control-0 puts things back the way they were, with no harm done. (The only exception is that if you sort your Desktop, switching in and out of Stacks removes your Sort By setting.)
Stacks may not be ideal for everyone, but many people whose Desktops are obscured by icons will appreciate how it cleans things up instantly and keeps everything neat and tidy.
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.
It’s that time of year again, when an Apple user’s thoughts drift to new versions of macOS, iOS, watchOS, and tvOS. Apple announced the new versions in June, and public betas have been available since. But once Apple makes macOS 10.14 Mojave, iOS 12, watchOS 5, and tvOS 12 available for free download, you’ll need to decide when to install each.
(Note that we say when and not if. There’s no harm in delaying major operating system upgrades until Apple has had a chance to squash early bugs. But waiting too long puts you at risk from security vulnerabilities and prevents you from taking advantage of new features. Plus, should you have to replace an Apple device unexpectedly, you will likely have to use the current operating system, which could be awkward if you weren’t ready.)
The hardest upgrade decision comes with macOS 10.14 Mojave. Whereas the last version of macOS—High Sierra—was a refinement upgrade that added few new features, Mojave introduces lots. Some people’s eyes will appreciate Dark mode, and the Dynamic Desktop changes subtly throughout the day. More practically, Stacks help organize files on cluttered Desktops, the Finder’s new Gallery view makes browsing images easier, and Quick Actions in the Finder’s Preview pane and in Quick Look let you work on files without even opening them. Apple significantly enhanced macOS’s screenshot and screen recording capabilities as well. And apps like Home, News, Stocks, and Voice Memos make the jump from iOS.
However, these features are bound to come with quirks and bugs, and Mojave’s new privacy and security controls may cause problems for older software. So we recommend waiting until at least version 10.14.1 or even 10.14.2 before upgrading. That gives you time to make sure your key apps are compatible with Mojave and for Apple to resolve any unanticipated problems.
iOS 12 is a different story, particularly if you have an older iPhone or iPad. That’s because Apple has focused on improving performance for such devices. If your device is bogging down, iOS 12 may give it a new lease on life. Also compelling is Screen Time, which helps you track your usage and set limits if you’re unhappy about how much time you spend giving Facebook your personal data. Screen Time even works for your entire family, so it could make dinner less device-intensive. A beefed-up Do Not Disturb lets you keep your iPhone from nagging you so much, and new features let you tamp down excessive notifications more easily. Finally, if you do the same things repeatedly, Siri Shortcuts can help you create your own Siri voice commands.
Our take is that iOS 12 is a good upgrade. Don’t pull the trigger instantly, since Apple may discover important bugs in the first week or two, but after that, upgrade when you have time to play with the new features.
watchOS 5 is linked to iOS 12, so you can’t upgrade your Apple Watch until your iPhone is running the latest. Most of the changes revolve around the Workouts app, with automatic detection of running workouts, a new Yoga workout, activity competitions, and more. Other new features include a Walkie-Talkie app, the arrival of Apple’s Podcasts app, a smarter Siri watch face, and improved notifications. There’s no downside to watchOS 5, so as soon as iOS 12 lands on your iPhone, set your Apple Watch to upgrade that night.
tvOS 12 is the easiest to agree to install. It’s a minor upgrade, with just a few new features. The most noticeable is a new aerial screensaver of Earth from low orbit, made by the crew of the International Space Station. You can also tap the touchpad of the Siri Remote while an aerial screensaver is playing to see where it was taken. When you start trying to type a password on the Apple TV, a notification on your iPhone lets you autofill that password. And finally, the Apple TV 4K gains support for Dolby Atmos soundscapes. So yeah, install tvOS 12 when it comes out, or let your Apple TV do it automatically.
As much as change can be hard, we’re excited about Apple’s new operating systems. Like you, we probably won’t end up using all the new features, but some will enhance the experience of being an Apple user.