on Windows the UAC (GUI sudo equivalent) requires actual user input (keyboard, mouse) on a dialog presented in a secure way (can't be faked by malware)
on Windows the UAC (GUI sudo equivalent) requires actual user input (keyboard, mouse) on a dialog presented in a secure way (can't be faked by malware)
Windows and Mac each have well thought through and secure solutions to these problems. It just doesn't exist on Linux without serious sacrifice of UX.
UAC is only a sudo equivalent when running under a non-admin user account, at which point it's nearly as convenient to simply run admin commands from a command prompt running as a separate user, or a separate desktop session entirely.