Disk Utility is Apple's go-to macOS app for finding and repairing common disk errors, but if it's your Mac's internal disk that's the problem, then your Mac might not even start up into macOS.

It won't cure all of your Mac's ills, but a quick and easy first step toward bringing a sluggish Mac back to health is using OS X's Disk Utility to repair disk permissions. Matt Elliott Senior Editor ...

A step-by-step guide to fixing a black screen on MacBook Pro or an external monitor.

Exact steps for Intel and Apple Silicon Macs ...

Repair Disk isn’t the first option you should choose if your Mac is ailing, but it is helpful when (for example): Performance has degraded Data is missing You are experiencing degraded system ...

Apple released its latest macOS update in September, dubbed High Sierra. For most, it should provide a fairly solid experience, however, if you want to perform more advanced tasks, such as formatting ...

OS X’s Disk Utility—which enables you to format, partition, repair, and perform other kinds of maintenance on disks (including SSDs, flash drives, and disk images)—is good for what it does. Yet for ...

Repairing Disk Permissions. Not exactly a topic that you would expect to spark much controversy. Yet, surprisingly, it is the focal point of a rather heated debate. The command itself is innocuous ...

A couple of weeks ago, my Mac displayed an alert that said my Time Machine disk was damaged and I should repair or replace it as soon as possible. The first thing I tried was Disk Utility's First Aid ...