Unfortunately, this hides the devices that you need to select to modify the partitioning of your backup disk. Watch a video of this tutorial on YouTube Show All Devicesĭisk Utility offers a very simplified view of your devices by default. Instructions for Big Sur, Catalina, Mojave, and 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.
