Glenn FleishmanSenior Contributor, Macworld

Glenn Fleishman is the author of dozens of books. His most recent, updated for iOS 14, iPadOS 14, and Big Sur, are Take Control of iOS and iPadOS Privacy and Security, Take Control of Your Apple ID, Second Edition, and Take Control of Wireless Networking and Security. He’s a senior contributor to Macworld, where he writes Mac 911.

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How to disable Wi-Fi on an iPhone or iPad and always use cellular data

The Wi-Fi on/off switch is the key, rather than the more convenient Control Center button.

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Can’t enable FileVault? An errant set of files may be blocking you

Some users are told that an institutional key has already been set on their Mac, even though they’re not part of an institution at all.

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How to get rid of the question mark on your Finder window’s toolbar

Why is there? Why? Why? It’s an old file or folder that has lost its way.

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Dropbox and iCloud Drive: How each service approaches cloud storage

The two services each take a different tack to reducing storage on a local drive.

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How to get rid of the screenshot drop shadow in macOS

You can opt to remove it only sometimes or permanently.

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How to take better screenshot selections in macOS

A number of extra keys can help you better shape a screen selection.

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Stop AirDrop in iOS with Screen Time

AirDrop can be abused by and abuse people. You can block it with Screen Time restrictions.

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Why can’t Family Sharing include more than six people?

Apple imposes a seemingly arbitrary limit to prevent misuses of the feature.

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How to fix the “cannot be autosaved” bug when saving documents in macOS apps

An oddball problem with an oddball fix and some workarounds.

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Happy birthday to…who? How to purge your calendar of acquaintances’ natal days

For historic and syncing reasons, you may wind up with more birthdays listed as events than you want.

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Two Screen Time tips to keep kids from working around limits

Screen Time is a powerful tool for managing kids’ screen time, but a couple settings make a big difference.

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How to send messages to select iCloud accounts directly to the trash

You can effectively turn some addresses into bit buckets.

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How to search your music library in macOS Catalina’s Music app

Three buttons let you choose among collections to search, but Your Library should be one of them.

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How to create a backup strategy with terabytes of files

As we take ever more photos and shoot more video, we have to think of new ways to back the material up.

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How to remove your iCloud account and Apple ID from a transferred computer

Even when you think you’ve logged out and wiped things clean, there may still be a lingering trace.