A mid-range signal level (shown in green on the heatmap when the default minimum and maximum levels are used) is actually considered good. Usually, routers and Wi-Fi transmitters are configured for a medium-strength signal, not an overly strong one. Reasons for this include security (to limit the area where people can potentially connect to your network) and noise prevention (so that you are not creating a lot of interference for your neighbors).
NetSpot WiFi site survey tool for macOS is available
You may also want to try removing any sleeve or case from your MacBook, to see if that makes a difference (some may interfere with your Airport adaptor’s antenna).
NetSpot WiFi scanner for Windows can be found here
updated: August 19, 2022 author: