Disk Utility

How to create blank disk images with Disk Utility

Should you ever find yourself in the need to create blank disk images, OS X’s built-in Disk Utility is your friend. A disk image usually has a .dmg extension and appears, looks and behaves like any ordinary file, with one key exception: launching it prompts OS X to mount the volume on the desktop.

These mountable disk images can be useful in a number of situations. For example, you may want to create blank disk images for storage.

Furthermore, disk images can be used as a virtual disk for software distribution, to burn CDs or DVDs and so forth. In this step-by-step tutorial, you’ll learn how to create blank disk images in Disk Utility, at any size, with optional password protection, formatting options and more.

How to repair Mac disk errors in macOS Recovery Mode

The built-in recovery partition on your Mac’s startup disk contains recovery tools, like Disk Utility. Recovery Mode makes it easy to repair your Mac’s disk in situations when the machine won’t boot properly and load the desktop in the first place. We show you how to repair disk error using Recovery Mode.

How to repair disk permissions on Mac

Some Mac hiccups and startup issues can be resolved by repairing disk permissions in OS X. Disk permissions allow your Mac to control what users have access to files and folders on your Mac.

Unfortunately, it’s quite easy to unintentionally mess up disk permissions. In fact, the very act of installing and uninstalling apps on your Mac can over time result in broken permissions.

And when file permissions break, your apps might be allowed to alter each other’s files or even modify read-only system files, which in turn can lead to various permission errors and erroneous behavior in OS X. It is therefore essential that disk permission in OS X are as they are supposed to be.

In this tutorial, I’m going to show you how to verify and fix disk permissions in OS X, which is typically a basic troubleshooting step to fix any software issues your Mac might be plagued with.

How to delete a partition on Mac

In an earlier tutorial, we showed you how to create a new partition on Mac. But what if, after testing, you wish to delete the partition and relinquish its space? In this video tutorial, we’ll show you how easy it is to dissolve a partition using macOS’ built-in Disk Utility.