I’m attempting to set a permanent new User Agent for Safari running on macOS Mojave (Developer Beta 10.14.0). However, it doesn’t work and changes to default each time. I ran the command below but it doesn’t seem to do anything. Is the behaviour possibly changed?
defaults write com.apple.Safari CustomUserAgent "\"Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en) AppleWebKit/419 (KHTML, like Gecko) Safari/419.3\""