Terminal may ask for access to files on the removable volume. Step 14: When prompted type a “y,” and press the Return key on the keyboard to submit. Step 13: Press the Return key on the keyboard to submit the full Terminal command and when prompted, enter your password. Step 12: Drag the USB flash drive volume into the Terminal window. Step 11: Connect a USB flash drive to your Mac it should appear in the Finder window. Step 10: In the ‘ Go to the folder’ box type /Volumes and click the Go button.

Step 8: Type -volume followed by a space. Step 7: Drag createinstallmedia to the Terminal window from the Resources folder noted in Step 4. Step 6: Type sudo followed by a space in the Terminal window. Step 5: Launch a new Terminal window by going to Applications → Utilities → Terminal. Right-click on Install macOS Big Sur → Show Package Contents. Close the macOS Big Sur installer once it’s fully downloaded Step 2: After downloading macOS Big Sur, the installer will automatically launch.

Until then, you can download the macOS Big Sur developer beta from Apple’s developer portal, or download the macOS Big Sur public beta via Apple’s public beta website. After Big Sur launches later this year, you’ll be able to download it directly from the Mac App Store. Subscribe to 9to5Mac on YouTube for more videos How to create a bootable macOS Big Sur USB install drive macOS Big Sur USB installer video tutorial Keep in mind that APFS-formatted drives cannot be used to create the macOS Big Sur USB installer. I recommend checking the contents, and then formatting the drive as macOS Extended Journaled (HFS+) via Disk Utility. Make sure that there’s nothing important that you need on the drive, because the full contents will be deleted. Not only is it super-affordable, but it comes both USB-A and USB-C connections, which allows the drive to connect to any Mac with ease. I still recommend this SanDisk Ultra Dual Drive USB Type-C Flash Drive. Of course, having more storage won’t hurt. The second thing to keep in mind is that you’ll want to get a USB drive with at least16GB of storage space. Because every modern Mac supports USB-C, and some Macs only feature USB-C, I recommend purchasing a USB drive with a USB-C connector. USB Flash driveīefore you begin, you’ll need to acquire a USB flash drive. Simply follow our step-by-step guide for the full details. This hands-on tutorial is valid for both the public and developer beta versions of macOS Big Sur, and will also work with the final version of Big Sur upon its release later this year. Making a bootable macOS Big Sur USB drive is a quick and clean way to install a fresh copy of macOS on your Mac.

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