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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What to do when keyboard commands don’t work at startup on your Mac

Holding down certain keys when your Mac boots can allow access to certain features. But sometimes your keyboard prevents these keyboard commands from working.

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What to do when your Mac's Wi-Fi hardware is having problems

Readers propose the mystery of the missing wireless connection.

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How to invert the text in a PDF in iOS

A colleague wants high-contrast text while viewing a PDF.

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Podcast 520: Coming up next on Apple TV

Glenn and Susie talk about the end of free Hulu, Apple's next steps for the Apple TV, and why we have a public beta of iOS.

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How to turn off iCloud Photo Library when you don't have enough local storage

A reader wants to disable syncing to iCloud, but can't download the full-resolution images and videos. Here's how to fix it.

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New emoji add gender parity and a more realistic drawing style in iOS 10 and macOS Sierra

Some cross into the uncanny valley, or at least from iconic to specific.

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Apple announces invitation-only bug bounty program at Black Hat conference

The company had lagged behind competitors in providing financial incentives to report exploits to it.

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Podcast 519: Three cheers for App Camp for Girls

Susie and Glenn are joined by Jean MacDonald and Grey Osten of App Camp for Girls, who discuss their project, their curriculum, and the vital importance of snacks.

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How far back Time Machine archives can migrate to new versions

A reader wants to know whether a Snow Leopard Time Machine backup can migrate to a new OS X installation.

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Apple TV Remote app puts a Siri Remote on your iPhone

Apple has released a replacement for its old Remote app, rather than an update.

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How to restore deleted files in OS X

A reader wants her files back.

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Keyboards may be leaking secrets, but probably not yours

Some wireless keyboards use little or no security to protect what you're typing. Check your model.

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Channels review: Turn your iPad or iPhone into a handheld TV

The Channels app lets you view over-the-air broadcasts and some cable programming in iOS with the right third-party hardware.

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I can’t quit you, iOS 10 beta

Having a hard time leaving the iOS 10 beta? A single file makes the difference.

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Tune up your two-step Recovery Key

An acquaintance recently lost access permanently to his Apple ID, but you can take action to prevent that.