Note: If you are using High Sierra or later macOS versions other than Big Sur, click the View button on the top left corner and select the Show All Devices option from the dropdown menu.
Alternatively, press Command + Spacebar to open Spotlight search and type Disk Utility to find and open it. Step 2: Launch Finder from Dock and open Disk Utility from the Applications section. Step 1: Connect the USB thumb drive or any external volume to your Mac system. So, make sure you have nothing stored on the USB.
You can use the ' createinstallmedia' command to create bootable USB for Mac.
System Preference > Software Update > Download macOS Big Sur. Note: If you have macOS Catalina, then follow the steps below to download Big Sur installer:
If you want to know how to create a bootable USB to install macOS Big Sur, Catalina, Mojave, and High Sierra, then this post is for you. You can use this bootable USB macOS installer to perform a clean install of macOS, install macOS from USB on a separate volume of your Mac drive, or in case your Mac encounters OS issues.
If you plan to install macOS on multiple Mac systems and don’t want to download the installer multiple times, then you can create a bootable installer.