Glenn FleishmanSenior Contributor, Macworld

Glenn Fleishman is the author of dozens of books, including his newly released A Practical Guide to Networking, Privacy, and Security in iOS 12. He's a senior contributor to Macworld, where he writes Mac 911.

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Best antivirus for Mac: Protect yourself from malicious software

We name the top free and paid Mac antivirus products to root out malicious software and prevent infections.

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The problems with older Apple displays and Thunderbolt 3 MacBook Pros

While you can connect many models of Apple displays to a laptop via USB-C, you can’t pass power, too, in a reliable manner.

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How old can your version of iOS be before upgrading?

Apple appears to have designed its backups with the future in mind.

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AirPlay 2, macOS, and the limits of the HomePod

Stereo playback hasn’t yet come to system audio output or other apps because it relies on AirPlay 2.

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One workaround for merging two Apple ID accounts

Apple doesn’t let you combine IDs, but if one is new, you could just give it up.

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How to securely dispose of old storage media, like hard drives and SSDs

You can digitally wipe out data from a hard drive or SSD, but in some situations, you might need to physically destroy the media.

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iOS: How to declutter Look Up

Look Up allows you to see dictionary definitions and more of selected words. Here’s how to adjust Look Up so it’s not so cluttered.

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How to copy a discontinued iOS app to another iOS device

If an app you rely on is no longer in the App Store, there are a few things you can do to possibly get that app on to a new device. But there are no guarantees.

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How to control the order of images in a Photos for Mac slideshow

It’s not your fault. The feature is broken, but there are workarounds.

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How to connect a TV or audio receiver to a HomePod

Plus, can HomePods manage surround sound? (No.)

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How to export photos and maintain the original creation date in Apple Photos

Keep the original creation date of your pictures.

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How to add more contextual search services in macOS

Searching with Google via Safari is the default, but you can use Automator to add others.

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How to disable My Photo Stream and iCloud Photo Sharing without erasing your photos

You might want to turn these features off, but you surely want to retain everything in them.

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How to set iCloud to save emails on your Mac, not in the cloud

For those who don’t want to sync their email, just retrieve it, the location of messages isn’t always clear.

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How to stop using cellular data for iCloud Photo Library syncing

There’s a switch for that, but a second switch that needs more examination.