Glenn FleishmanSenior Contributor, Macworld

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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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iMessage: How to pick a reply address in iOS and macOS

With many options, what’s the right choice across many devices and computers?

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How to fix the wrong Time Machine adoption for a drive swap

You have to turn to the Terminal to make certain kinds of Time Machine swaps work.

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How to use printer presets in macOS

Many people don’t realize they can save their print dialog preferences for future use.

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How to find a missing app in iOS 11

Apple changed how it shows app folders in Siri search results in iOS 11.

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How to restore missing expansion triangles in the Finder

What to do if you can’t click a triangle to see what’s in a folder.

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How to manually add apps to your iOS devices in iTunes 12.7

While Apple removed app sync from iTunes, there’s still a manual method.

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Hey Siri, stop suggesting spammers’ email!

How do you get Siri in macOS to stop offering up email addresses?

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How Time Machine manages backup archives

Time Machine lets you remove backup snapshots manually, which could lead to trouble.

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How to find out who purchased a song from iTunes Store

You may be getting regular popups asking you to sign in.

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Should you upgrade your Fusion Drive iMac to macOS High Sierra?

Users are concerned with Apple new APFS format.

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Is iCloud required when you upgrade to iOS 11?

Apple really wants to use its services, many of which are effectively free, but you can avoid them.

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How to set offline access for Safari's Reading List feature

The useful feature for reading articles later requires an extra step if you’re offline.

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How to simulate the Mac's Desktop folder to get around iCloud continuous sync

Desktop & Documents isn’t designed for continuous updates of large files.

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Another warning: Don't convert your Time Machine volume from HFS+ to APFS

People are still running afoul of a High Sierra issue: APFS breaks Time Machine archives.