Glenn FleishmanSenior Contributor, Macworld

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Glenn Fleishman is the author of dozens of books, including mostly recently Take Control of Slack Basics, a book on mastering and becoming efficient in Slack. He's a senior contributor to Macworld, where he writes the Private I and Mac 911 columns and hosts the Macworld podcast, and contributes regularly to many periodicals.

rick astley

In short, stop using brief URLs

Once upon a time, URLs broke, texts were expensive, and space was tight. Those times are gone.

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Two issues with iCloud Photo Sharing

A reader wonders where comments go when they remove items from shared albums. Plus downloading shared items.

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When iTunes accounts intermingle: How to separate the data

A reader wants to help her loss-prone boss keep his data backed up for restoring to his string of new phones.

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How to disable mouse and keyboard low-battery warnings (you can’t)

The eternal verities: death, taxes, and OS X's low-battery warning for Bluetooth mouses and keyboards.

Podcast 492: How to travel like an international superspy

Security researcher Rich Mogull joins us to talk about security when traveling to countries where you might have a very good reason to be paranoid.

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Chapters review: Mac app adds segment marks to MP3 podcasts and audio files

It's a very specific app, but if you need it, it's the only way to get this option.

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How to get a Mac laptop's headphone jack to work reliably

A reader writes in with a common problem with MacBooks of all vintages related to audio output.

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When AirPort base stations don't appear over Ethernet

A reader can't configure his network with an Ethernet-only connection.

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LastPass fixes some browser-based impersonation weaknesses

The password-management company responded to a security researcher by battening down the hatches. But messages in a browser can't be trusted.

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Default Folder X 5 review: Mac app advances the state of file navigation

Despite new limits in El Capitan, the wholly rewritten Default Folder X 5 not only restores previous functionality, but exceeds it with new options.

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Switch to six digits for your iOS passcode

A court case makes it clear the government can at least try to brute-force your iPhone's four-digit passcode.

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How to navigate among tabs in Safari for El Capitan

A reader wants to let her fingers do the walking among Safari's tabs.

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Podcast 491: Make A-Mac-ica great again

We discuss the technology in politics, with Donald Trump's plan for force Apple to make its hardware in the U.S., and the New York Senate's back-door demand. Plus VLC, Netflix, and more.

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How does Photos resize images on export or drag?

Photos for OS X has changed its export behavior since its initial release. You almost need a flowchart to figure it out.

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How can you exit a group Messages chat?

What happens when you're roped into a group chat that you want to exit? You've got a couple of options.