Glenn FleishmanSenior Contributor, Macworld

Glenn Fleishman is the author of dozens of books, including his newly released Connect and Secure Your iPhone and iPad (covers iOS 13.1 and iPadOS 13.1), a detailed guide to networking, privacy, and encryption. He's a senior contributor to Macworld, where he writes Mac 911.

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How to reinstall macOS if macOS Recovery is unavailable

Apple has a fallback option that requires an internet connection.

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How to recover deleted photos from an iPhone or iPad

Chances are they’re gone, but there are a few places you can check.

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If you can’t get macOS Mail to work after upgrading to two-factor authentication, here’s a way to fix it

You may have manually set up your iCloud account for email long ago.

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What you can do with an internal SSD module from a vintage Mac

Got an older Mac, and you upgraded the SSD module? You can put the old SSD in an external enclosure, but they’re not cheap.

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Loopback 2 review: Elevates the interface for sophisticated sound routing in macOS

This pro-level audio input mixer app for Mac is useful for musicians, DJs, audio engineers, and podcasters.

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Can you replace a fan in Apple’s AirPort Extreme?

It’s not a trivial task, but it can be done. (And yes, the AirPort Extreme has an actual fan.)

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What to do when the Mac App Store won’t assign applications to your account

You have several methods to try to resolve the problem.

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What you get when you export Calendar and Reminders in macOS, and how to use those files

The archive formats vary by app and by export selection in Calendar.

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Stuck in macOS Recovery with a language you don’t speak? Here’s what you can do to fix this

You don’t have to speak Chinese, Russian, Spanish, or other languages to fix this problem.

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The most important thing to do if your Mac has a Fusion Drive: Back up your data

Apple's Fusion Drive combines data on an SSD and hard drive. It provides fast speeds and spacious storage, but trying to recover lost data is a huge problem.

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If macOS’s Migration Assistant fails, here are other ways to move accounts

Apple has taken great strides with its migration helper, but it doesn’t always do the trick.

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How iOS’s Wi-Fi Assist works and how it can affect your cellular bill

A bad Wi-Fi connection can still cause your iPhone (or iPad) to use cellular data.

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Can’t figure out how to type a character on a Mac? It’s time for the virtual keyboard

There’s a hidden virtual keyboard in macOS that is very helpful when you need to type an uncommon character or your hardware keyboard is suddenly malfunctioning.

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If you have an older Mac, don’t forget about the SD Card slot

This is probably the best way to expand storage.

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The old guard of Mac indy apps has thrived for more than 25 years

BBEdit and other popular indy Mac apps have been around for over 25 years. Here are insights from over a century of development of Mac apps from four long-term developers.