Glenn FleishmanSenior Contributor, Macworld

Glenn Fleishman is the author of dozens of books, including his newly released Take Control of Your Apple ID, a guide to troubleshooting Apple ID problems and managing security and the features. He's a senior contributor to Macworld, where he writes Mac 911.

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How to recover a Mail folder from Time Machine in macOS

Sometimes Mail won’t let you bring back a missing folder. There’s another way.

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One way to use an iPad as a display for a headless Mac

You can control your Mac without a screen, but it can’t be done after the screen is removed.

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How to erase documents on a printer before sale or disposal

Most printers don’t retain information; multi-function printers might.

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MacOS File Settings: The difference between Locked and Sharing & Permissions

Permissions and local file properties are unrelated, but can serve a similar purpose.

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How to stop Calendars from showing holidays and birthdays

An option to hide a couple of special calendars isn’t found in Settings.

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Preventing outgoing calls on an iPhone

It seems like a reasonable limitation that a parent may want to have on a child's phone.

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Help us with the case of the mysterious ‘Dust Me’ hard drive label (Solved!)

We needs your help in figuring out this problem for a Macworld reader.

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How to install macOS updates without an Apple ID

While the Mac App Store wants you to log in, it’s not strictly necessary.

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How to choose the best Wi-Fi replacement for your Apple AirPort routers

What other options work best for Mac, iPhone, and iPad owners?

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Omnicharge Omni 20 USB-C battery pack review: Fast charger can handle two laptops at once

A rugged, high-performance USB-C battery pack with the fastest charging and recharging time, but expensive for its capacity and efficiency.

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Photos not importing? Figure out the culprit with Image Capture

Sometimes, a bad image or a large import can be at fault, but you can break it down.

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Problems with an Apple AirPort? It could be a hardware failure

We’ve seen many reports that failing Apple base stations create transient problems that can only be fixed by replacement.

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Wi-Fi gets quicker with 802.11ax, but buying early might offer few advantages

The latest Wi-Fi standard makes home networks faster, especially for video streaming.

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macOS High Sierra: Why you can't format an internal SSD with HFS+ format

But you can downgrade and reformat for an older version of macOS.

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How to find your FileVault recovery key in macOS

If lost, you’re sunk, but you may have opted to store it in iCloud.