In the case of macOS, you can install it on a separate APFS volume [1] without touching your current installation. I have been using it to test the new feature

In the case of macOS, you can install it on a separate APFS volume [1] without touching your current installation. I have been using it to test the new features in Xcode 11/ iOS 13, and it has spared me many headaches. https://support.apple.com/en-ca/HT208891 https://support.apple.com/en-ca/HT208891