Don't-Miss OS X Stories

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Installing OS X: What to do when ‘this copy of the install OS X application cannot be verified’

If you encounter an error when trying to install a fresh operating system, it could be a problem with the date and time.

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How to create a bootable macOS Sierra installer drive

Instructions for making an external drive that you can use to install macOS Sierra.

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How to configure a software RAID in macOS Sierra’s Disk Utility

The ability to set up a software RAID has returned to Apple's utility.

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How to deconstruct a software RAID made with macOS Sierra’s Disk Utility

If you created a RAID using Disk Utility and now you don’t want to use the disks as a RAID anymore, here’s how to delete the RAID.

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How to see every Mac, iPad, and iPhone associated with your Apple ID

Apple's device authorization and management tools are a little hidden—Jason Snell explains.

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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 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.

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Create a disk image for NetBoot and NetRestore

The next installment in our series on mastering the NetInstall Service for OS X Server.

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How the NetInstall Service works

Before using the NetInstall service, understand how it works and to learn about the four different types of NetInstall images.

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How to manually exclude images from a Smart Album in Photos for OS X

A reader wants to customize the results of a Smart Album, and we found a workaround.

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Nope, you can't tell if someone has received your Mail Drop file

Apple doesn't provide an acknowledgement loop for email attachments sent by Mail Drop, and you can't "remove" files from Mail Drop either.

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Bluetooth's soft limits in OS X: Count your devices

A reader finds a common problem: Too many Bluetooth devices connected to one Mac can perform inconsistently.

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How to set a custom order in an album in Photos for OS X

My 9-year-old came to me with a question about arranging photos in an album in OS X.