Thanks I have installed macOS Sonoma on a separate volume. 1. Created a separate volume (https://support.apple.com/en-gb/HT208891). 2. Created a bootable installer for macOS Ventura using https://support.apple.com/en-gb/HT201372. 3. Install on macOS Ventura on new volume. 4. Upgraded to macOS Sonoma. That way both it is possible to dual boot to macOS Ventura (original volume) and macOS Sonoma (new volume).
Topic:
App & System Services
SubTopic:
Core OS
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