inSSIDer
inSSIDer is a Wi-Fi network scanner and analysis tool that detects wireless networks operating in the 2.4 GHz and 5 GHz bands and displays detailed information about each network including SSID, MAC address, channel number, signal strength, and security type. It was originally developed as a successor to the Windows-only NetStumbler tool and is used by network administrators, IT professionals, and homeowners troubleshooting Wi-Fi interference or optimizing channel selection. The app can integrate with GPS receivers to map network locations and export data in NS1 and KML formats for use in other applications.
AI Recommendation
1 suggestioninSSIDer appears to be no longer actively maintained, and there is no native Apple Silicon build available. The last significant release was version 4.0, and there is no evidence of updates in recent years. Since it is an Intel-only application, it currently runs under Rosetta 2 on Apple Silicon Macs, but will stop launching entirely when Apple removes Rosetta in macOS 28 (September 2028). As a functional alternative that runs natively on Apple Silicon, consider NetSpot, which offers similar Wi-Fi network scanning, heat mapping, and channel analysis features. NetSpot is actively maintained, available both as a free and paid version, and will continue to work beyond September 2028. Other native alternatives include Wireless Diagnostics (built into macOS, accessed via Option-click on the Wi-Fi menu icon) for basic network information, or KisMAC2 if you need a more open-source option.
Recommended reading