Watch a longer, in-depth tutorial about using Disk Utility Show All Devicesĭisk Utility offers a very simplified view of your devices by default. Watch a video of this tutorial on YouTube Instructions for Big Sur, Catalina, Mojave, and High Sierra macOS 10.12 Sierra and OS X 10.11 El Capitan.macOS 11Big Sur, 10.15 Catalina, 10.14 Mojave, and 10.13 High Sierra.
Choose About This Mac from the Apple menu to determine your current OS, then make a selection below. The remaining steps vary considerably depending on the operating system you are running.