macOS comes with a pretty good wifi scanner. It even recommends the best channels for common frequency ranges, like this: https://letstalk-tech.s3.amazonaws.com

macOS comes with a pretty good wifi scanner. It even recommends the best channels for common frequency ranges, like this: https://letstalk-tech.s3.amazonaws.com/wp-content/uploads/2014/12/Screen-Shot-2014-12-29-at-16.38.54.png https://letstalk-tech.s3.amazonaws.com/wp-content/uploads/20... It's buried in the Window menu of the Wireless Diagnostics app, though.