An extremely welcome under-the-hood change in iOS 11 and macOS 10.13 High Sierra is that Photos facial recognition syncs across iCloud Photo Library. Previously, people you identified on one of your devices remained unidentified on others. But what if Photos now identifies the same person twice, such that they have two separate entries in the People album? Just drag one entry on top of the other, in either the Mac or iOS version of Photos, and agree that they’re the same person when Photos asks.

There are two basic types of storage devices available today: hard disk drives and solid-state drives. For the lowest cost per gigabyte, you can’t go wrong with a hard drive, and they come in truly massive sizes—up to a whopping 8 terabytes. However, they’re relatively slow.

For speed, you want a solid-state drive, also known as an SSD. Because SSDs rely on flash storage, a type of non-volatile memory whose chips retain data without power, they’re lightning fast. But chips are more expensive than hard disk platters and read/write heads, so the $250–$300 that will get you an 8 TB hard drive is enough for only a 1 TB SSD.

In 2012, Apple came up with a compromise: the Fusion Drive. As its name suggests, a Fusion Drive melds a hard disk drive with flash storage to provide the best of both worlds. The user sees just a single volume, but behind the scenes, macOS automatically and dynamically moves frequently used files—notably those used by the operating system—to the flash storage portion of the Fusion Drive for faster access while keeping infrequently used files on the hard drive.

In essence, the Fusion Drive provides much of the speed of an SSD along with the capacity of a hard drive. What’s not to like?

There are some caveats. Good as a Fusion Drive is, it will never be as fast as a pure SSD, and you’ll probably notice that most when working with older files. Try editing some photos from last year in Photos and you’ll likely be working entirely on the slow hard drive.

Also, Apple provides the Fusion Drive as an option only for the iMac and Mac mini; there’s no room it in a modern MacBook. But not all Fusion Drives are created equal. They come in 1 TB, 2 TB, and 3 TB sizes, although not all iMac and Mac mini models can accept the larger Fusion Drives.\

Originally, all Fusion Drives had 128 GB of speedy flash storage alongside the hard drive, but in 2015, Apple reduced the amount of flash storage in the iMac’s 1 TB Fusion Drive to a paltry 24 GB (the Mac mini’s 1 TB Fusion Drive still has 128 GB). The company subsequently increased it to 32 GB, but if you’re buying a new iMac and want better performance from a Fusion Drive, go for either 2 TB or 3 TB, both of which have 128 GB of flash storage.

One final note. As of this writing, macOS 10.13 High Sierra will not convert a Fusion Drive to Apple’s new APFS file system. We anticipate that will change at some point in the next year, and APFS might make Fusion Drives even a bit faster.

All that said, if you want the best performance and can afford the cost, get an SSD. If you need more space than an SSD can provide, consider using the SSD internally and adding an external hard drive connected via USB 3 or Thunderbolt 3. Barring that, a Fusion Drive—particularly one with 128 GB of flash storage—remains a good compromise. Honestly, we can’t currently recommend a hard disk drive as the primary storage for a Mac unless low cost is paramount. Hard drive performance just isn’t good enough.

Ask Siri to search the Web and you’ll get five results back from Google (not Bing anymore!). Tap one and it opens in Safari. But what if that page doesn’t contain the information you want? How do you get back to Siri’s results? The easy way is to tap the little Siri button that appears in the top-left of the screen. Or activate Siri again, but instead of speaking, swipe down on the screen until “What can I help you with?” disappears and your recent Siri queries appear with your last search results in view.

Apple gives iCloud users 5 GB of free storage, but that fills up fast with iCloud Photo Library, iOS backups, iBooks, and more. Until iOS 11 and macOS 10.13 High Sierra, each person in a family had to buy extra iCloud space separately. Happily, Apple has now made it so everyone in a Family Sharing group can share a single 200 GB ($2.99 per month) or 2 TB ($9.99 per month) plan. The family organizer can start sharing storage in High Sierra or iOS 11 as follows: on the Mac, go to System Preferences > iCloud > Manage Family > My Apps & Services > iCloud Storage; in iOS, go to Settings > Your Name > Family Sharing > iCloud Storage. Any other family member can then cancel their paid plan and join the Family Sharing plan using their iCloud Storage screen.

Distracted driving may not make headlines, but it’s a huge problem. In the United States in 2015, the National Highway Traffic Safety Administration says that 391,000 people were injured and 3477 killed in accidents caused by distracted driving.

Many things can distract drivers, but the most concerning—and the most avoidable—is texting. Given that the iPhone has a 30–40% share of the market, it might have been involved in as many as 100,000 injuries and 1000 deaths in just 2015. Not good.

Apple has stepped up to the plate by introducing the Do Not Disturb While Driving (DNDWD) feature in iOS 11. You’ll be prompted to enable DNDWD when it first detects that you’re driving in a car after you install iOS 11. In normal use, it activates automatically when you’re driving, blocking notifications and preventing you from using apps until you stop the car. Here are answers to the most common questions we get about DNDWD.

How does the iPhone know that I’m driving?

The most reliable way is that your iPhone has connected to a car via Bluetooth. Obviously, that requires the car to support Bluetooth, and that you pair your iPhone with it. If there’s no Bluetooth connection, the iPhone uses its accelerometer and signals from nearby Wi-Fi networks to figure out that you’re driving.

In Settings > Do Not Disturb > Activate, you can choose from Automatically, When Connected to Car Bluetooth, or Manually. Stick with one of the first two options unless the iPhone regularly fails to detect that you’re driving, at which point you can add the Do Not Disturb While Driving button to Control Center, and activate DNDWD with it.

Will any notifications break through the DNDWD cone of silence?

Yes. As with standard Do Not Disturb, timers, alarms, and emergency alerts will still work. Plus, you can opt to receive urgent text messages. To enable this feature, go to Settings > Do Not Disturb > Auto-Reply To and choose a group (Recents, Favorites, or All Contacts). Those people will get an auto-reply—which you can personalize—when they text you, and if they reply to that auto-reply with the word “urgent,” the message will be delivered.

What about phone calls?

If your car has a Bluetooth hands-free system, phone calls will come in as they always have, and you can answer them via your steering wheel controls and carry on the conversation using the car’s built-in mic and speakers.

However, if you don’t have car Bluetooth or another hands-free accessory, DNDWD will block calls just as they would be by standard Do Not Disturb. That means you can allow calls from specific groups in Settings > Do Not Disturb > Allow Calls From and let anyone through if they call twice within 3 minutes.

Can I still use Maps to navigate?

Yes! Maps works on the Lock screen just as it always has, though it’s best started before you begin driving. If you keep your iPhone in a car mount so you can use it for navigating, DNDWD won’t get in the way.

Will Siri still work while in DNDWD?

Indeed it will, both via Hey Siri and by holding the Home button. But don’t do that—Hey Siri is safer than taking your hand off the wheel to press the Home button.

Siri won’t do some things for you while you’re driving, like open apps. Plus, Siri tries to respond to you so that you won’t have to look at the iPhone, reading all responses instead of displaying them on the screen.

How do I turn off DNDWD if I’m a passenger?

If DNDWD is on and you try to use your iPhone, an I’m Not Driving button appears. Tap it, and you can use your iPhone normally for the rest of the trip. If you’re always a passenger, go to Settings > Do Not Disturb > Activate, and select Manually. Then, if you do want to turn DNDWD on, you can use its Control Center button.

So hey, if you didn’t turn on Do Not Disturb While Driving when you first set up iOS 11, do us and everyone else on the road a favor and turn it on now. The life you save could be your own.

With iOS 11, the iPhone and iPad interfaces continue to diverge, which makes sense, since the iPad is not merely an overgrown iPhone. Particularly when you pair an iPad Pro with a Smart Keyboard and Apple Pencil, you can now get real work done on an iPad more fluidly than ever before. The “hard” part is learning how you switch between apps, display a second app in a Slide Over panel that floats on top of another app, or make two apps share the screen in Split View.

Switch Between Apps

Moving between apps is a key aspect of using the iPad. Apple has provided multiple ways to switch so you can pick those that best fit your style:

• Press the Home button, and on the Home screen, tap another app’s icon.
• On the Home screen, swipe down to show Siri app suggestions and search for another app.
• Within an app, swipe right or left with four fingers.
• Within an app, swipe up from below the bottom of the screen to reveal the new Dock, and then tap an icon on it. Note that the three rightmost icons are the most recently used apps.
• After revealing the Dock, keep swiping up to reveal the new app switching screen, then tap an app thumbnail to switch to it. Swipe right to see less recently used apps.
• From a Smart Keyboard or other keyboard, press Command-Tab to bring up a Mac-like app switcher. Release both keys quickly to switch to the previous app instantly, or keep Command down while you press Tab repeatedly to move sequentially among the shown apps, letting up on Command to switch. While the app switcher is shown, you can also tap an icon in it.

Display an App in Slide Over

Say you’re having a sporadic conversation in Messages while browsing the Web in Safari. You don’t need to see both apps all the time, but you also don’t want to have to switch back and forth. With Slide Over, you can put Messages in a panel that floats over Safari and then hide and show it.

The easiest way to put an app in a Slide Over panel is to use the Dock, so this technique works if the app’s icon is already on the Dock. For instance, while you’re in Safari, swipe up from the bottom of the screen to display the Dock. Then touch and hold the Messages app’s icon until it dims slightly. Keeping your finger down, drag the icon over Safari until it becomes a vertical lozenge. Lift your finger, and Messages appears in Slide Over.

If the app you want to put in Slide Over isn’t on your Dock, you can use a two-handed procedure to get it from another location and drop it onto another app. For instance, you can start dragging an app icon from any place where app icons appear, including the Home screen or Siri search screen. Once you’ve started dragging it, use your other hand to switch to the other app (perhaps via the Dock or pressing Command-Tab on an external keyboard) and then drop it over the other app. Don’t worry if you find this approach confusing at first—it takes some time to become accustomed to two-handed usage.

Once an app is in Slide Over on the right side of the screen, you can swipe right on its left edge to hide it, or swipe left on its right edge to move it to the other side of the screen.

Put an App in Split View

Displaying two apps side-by-side in Split View is almost the same action as Slide Over. The only difference is that, instead of dropping the app lozenge on top of the current app, you drag it to the far left or right of the screen, and drop it once the screen shows a 90/10 split—after you drop, the split changes to 70/30.

Drag the handle between the apps to switch to a 50/50 split or a 30/70 split; if you drag the handle all the way to one side of the screen, the app that’s shrinking in size disappears entirely. One of the two apps in Split View will have a handle on its top as well, and dragging it down slightly converts that app into a Slide Over panel. (You can also drag a Slide Over panel’s handle down slightly to switch to Split View.)

Take a few minutes and try putting apps in Slide Over and Split View in different ways, since some of the actions require practice before they feel natural. Finally, if combining two particular apps doesn’t seem to work, don’t fret. Apps must specifically support both Slide Over and Split View, and not all do.

We’ve been hearing reports from people whose Macs have been locked remotely via Find My Mac, with the criminals responsible holding access to the Mac hostage until they receive a ransom in Bitcoin. First, if this happens to you, do not pay the ransom! Any Apple Authorized Service Provider or Apple Store can unlock your Mac for you if you bring it in and provide proof of purchase. Second, if you ever used your iCloud password on another site, change it immediately, since if that site was hacked, your iCloud account is now vulnerable. Unfortunately, Apple’s two-factor authentication, which is otherwise great, does not currently protect against this problem! Learn more at TidBITS.

The writing is on the wall: Apple doesn’t want us downloading or managing iOS apps on our Macs anymore. Most of the changes in iTunes 12.7 revolve around features Apple removed, including ringtone management and iTunes U. But the kicker is the removal of the iOS App Store and support for app syncing. This means you won’t be able to click a link on a Web site on your Mac to download an iOS app to iTunes, nor will you be able to use iTunes to choose which apps are on your iOS device. You can’t even customize Home screen layouts from within iTunes. All those tasks must now be done on your iOS device. You can still back up your iOS devices to iTunes—but if you have to restore, your apps will be downloaded from the App Store. Sorry!

When you want to capture that perfect action shot or incriminating video, it’s a mad rush to open the Camera app as quickly as possible. That’s why Apple lets you get to the camera in multiple ways: by swiping left on the Lock screen, using the Camera button in Control Center, and tapping the Camera icon on the Home screen. iOS 11 adds another shortcut that could be useful: from within any app, swipe down from above the top of the screen to display the Lock screen, and then swipe left to get to the camera.