Don't-Miss Operating System Stories

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Starting up from NetBoot and NetRestore images

Step-by-step instructions on how to use the NetInstall service.

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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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How to run apps that are not from the App Store in macOS Sierra

Apple made a major change to the Security & Privacy settings that affects new software you want to run.

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How to create NetBoot and NetInstall images

The latest in our series on using the NetInstall service.

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How to fix a long pause with a black startup screen in OS X

A reader has a 45-second pause when he restarts his Mac. During that meditative period, he wonders: why?

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How to use the Tabs feature in macOS Sierra

Tabs will help clean up your windows and make it easier to find what you need.

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How to use Picture in Picture in macOS Sierra

Watch video while you're working on your Mac.

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How to use Feedback Assistant to report bugs in the betas of macOS Sierra and iOS 10

Using the public betas? Do your duty and report bugs to Apple.

mbp flash storage

How to hand off your Mac for repair without worrying about insecure data on an SSD

A reader would prefer to not send his computer off to get fixed with all of the contents of its drive being accessible to a technician. What to do?

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How to create your first NetInstall Image

Before you can turn the NetInstall service on you need to create a network disk image to boot from. Here's how to do it.

The power of OS X’s menu bar

It’s always there and it’s often overlooked, but the menu bar is a very useful part of the Mac operating system.

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How to sort files and folders in the Finder

A reader is having folders jump about, and wants to set them in place.

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How to avoid a blank second display when using full-screen mode in an OS X app

A reader's El Capitan installation started blacking out one monitor when he's using apps full screen.

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How to sort Launchpad apps

A reader thinks he's overlooked a feature. In fact, the feature is missing!

apple keyboard diacritical remarks

How to active or restore missing press-and-hold diacritical marks in OS X

A reader has a grave complaint about an acute problem adding accents.