The iTerm2 beta features the borderless windows. You can grab a nightly build from https://www.iterm2.com/downloads.html https://www.iterm2.com/downloads.html.

The iTerm2 beta features the borderless windows. You can grab a nightly build from https://www.iterm2.com/downloads.html https://www.iterm2.com/downloads.html. The settings is Preferences -> Profiles -> Window and then select "No Title Bar" in the drop-down for style.