You can download 5.6.1 from Apple: https://support.apple.com/kb/DL1536?locale=en_US https://support.apple.com/kb/DL1536?locale=en_US You will need to manually

You can download 5.6.1 from Apple: https://support.apple.com/kb/DL1536?locale=en_US https://support.apple.com/kb/DL1536?locale=en_US You will need to manually unpack it via pkgutil/tar. However, it will won't run under 10.12 since it requires an older version (Mountain Lion) of Apple80211.framework. Assuming you have a copy of the older framework, you can make it work. Fortunately, someone has already done this work: https://zcs.zyniker.org/airport-utility-v5-6-1/ https://zcs.zyniker.org/airport-utility-v5-6-1/