redtuxter

Can confirm, requires BOTH SIP to be disabled, and the Full disk access in Security Preferences. To disable SIP (although you probably shouldn't do this): > Reboot mac > Press CMD + R until you see the apple logo > Enter admin user password > Open Terminal from the menu bar > Type `csrutil disable` > reboot It's best to re-enable SIP after you've made your USB disk. But to illustrate the point, this does work. Whether it's worth it or not is another discussion. It's also curious that balena etcher does mostly the exact same thing, but is more utility in the ISO you're selecting to use, but does not suffer from this Catalina security issue. The new security posture of MacOS in general is a HUGE annoyance. It's not very transparent in what it's blocking at all.