Well done wifi network scanner

This is made to scan your wifi/wired network. It’s of most benefit to those with wifi who aren’t sure they’ve fully secured their network and want to look for intruders.

You’d set up a wifi network, or join a wifi network, with your Mac, and then you scan the network using this tool. You then label all of the computers [say, ‘Joe’s Macbook’ and ‘Jim’s iPad’] you recognize, plus any additional networked items (routers, networked TVs, networked media players, network attached storage, etc.) you recognize, and then you can save and quit the application.

After that point, from time to time, you’ll re-run the application and then let it run in the background, scanning your network (it scans everything, wired and wifi - anything it can hit on your own subnet) and then it will list and identify any new devices. You can then either mark the new device(s) as known (if you know what they are, and ‘trust’ them) or leave them as unknown. (If it’s unknown, assumedly you’d want to do some research and figure out who or what unknown item is on your network…)

The program ships with a database of MAC addresses, so it can make a good guess at the manufacturer [a Macbook would be labelled ‘Apple’, an Amazon Echo would be labelled ‘Amazon’] for perhaps 75% of the items it’s likely to find on your network; for the rest, it will show as ‘Unknown’ and you can do a bit of googling to find a web page with a more modern MAC address database.

One improvement: For a later version (I reviewed 1.1.1) to ship with a more comprehensive MAC address database so more manufacturers are identified automatically. Other than that, no obvious issues, flaws, or room for improvement that I see.

dcm12 about Who Is On My WiFi