Tools you will need:
- USB Memory stick 32GB
- Mac that can download Sequoia
- Good Internet Speed
Download Sequoia from the app store. Once downloads plug in the USB stick change the name to MyVolume. Check the Installer has download by checking the Applications folder then use this terminal command to run in terminal to create the boot stick.
Terminal Command:
sudo /Applications/Install\ macOS\ Sonoma.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
You will be promoted for the admin password. Then confirm with a y in terminal. The installer will go away and ask to give access to the drive (USB) older OS might not ask you this question. Once confirmed wait for the installer to setup the USB stick. This will take a while depending on the speed of the USB. Once completed the Terminal window will state the the media is now ready.
To confirm boot to the USB stick and install from the USB stick. Note If you decide to format the drive and it’s a silicon machine the machine will reboot. On a reboot it will boot to the current recovery OS of that machine so if Sonoma was installed it will boot to that and ask you to re install that OS. You will need to boot to the Sequoia memory stick so I would reboot to that stick which will allow you to install and test the USB stick you just created.
Handy Links to Apple Website
USB Guide https://support.apple.com/en-gb/101578
macOS Sonoma compatible machines https://support.apple.com/en-us/120282