

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. It is to be noted that the createinstallmedia command erases everything on your external USB drive.Insert the relevant command in the Terminal with utmost caution.Post Maverick, creating a bootable USB installer for macOS requires a single command (which we have given below for each macOS separately).Note: The process described below applies to the macOS Maverick and later versions only.īefore you move ahead, here are a few facts that you must know: Follow the steps below to create a bootable USB of any of the macOS mentioned above. 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: The above procedure will download the installer file in your Applications folder as an app named Install macOS Big Sur/ Catalina/ Mojave/ High Sierra. If the installer opens after download, close the prompt without continuing the installation.The installer file will start to download.In the App Store, you will find the macOS Installer, click on Get button on the top right corner.

You can use the App Store to download the installer file. A prompt appears asking you to use the App Store instead of the website. It will redirect you to the Apple website.Click on the macOS for which you want to download the installer file.

Follow the below steps to get the macOS installer file of Big Sur, Catalina, Mojave, and High Sierra: To create bootable USB for Mac, you need to first download the macOS installer file.
