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.

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How to avoid credit-card fraud, from someone thrice burned

I, for one, welcome our Apple Pay and chipped overlords.

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How to erase a Mac that seems to lack erasure options

A reader wants to wipe her Mac before getting rid of it, but she doesn't see a clear way to do so.

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Stagefright for iOS and OS X? Don't lower the curtain yet

Five bugs fixed in the latest iOS and OS X releases could allow maliciously crafted images to hijack a device only if a number of hurdles were crossed.

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Podcast 517: iCloud Music Library meets its Match

Apple Music, iCloud Music Library, and iTunes Match just got slightly less confusing, and Pokémon Go can't stop.

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Why ransomware criminals need great customer service

Yes, even bad-guy malware developers have to keep their "customers" happy. Read what happens when F-Secure tests the "help desks" of four crypto-locking malware makers.

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How to make your Apple Watch display its screen longer

Set your Apple Watch so the screen stays on for a longer period of time.

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How to dispose of a printer securely

You might think printers have no private data. But some may retain vestiges.

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How to use iCloud Photo Library selectively

A reader wants to reduce her iCloud Photo Library size as she's run out of her purchased storage. There's a workaround.

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How to fix missing media items in the sidebar

A reader lacks Photos, iTunes, and Movies items in the Open dialog.

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Hands-on with Walmart Pay: The retailer's answer to Apple Pay is a pleasant surprise

The company's app-based payment system for in-store purchases isn't perfect, but it's nearly delightful.

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Podcast 516: The Pokémon invasion

Glenn and Susie talk about the iOS 10 beta, macOS Sierra beta, new Mac malware, and whaaaaat is the deal with Pokémon Go.

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How to cope with a terrifying iOS Photos deletion warning

If you have iTunes syncing enable and switch to iCloud Photo Library, Apple warns you it's deleting your media.

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Pokémon Go for iOS will stop requiring full Google account access

Pokémon Masters, beware: The iPhone app gains access to your Google account, but you can revoke the access now, and a better fix is coming.

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How to avoid Mac malware by using Gatekeeper and common sense

Two new attacks on Mac users and a coming change in macOS Sierra show that educating users beats malware.

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How to consolidate calendar events among multiple people

A reader wants to avoid duplicates after sharing calendars with colleagues.