Jul 31, 2012 - From any Finder window, hit Command+Shift+G and enter the path: /System/Library/CoreServices/ Locate “Wi-Fi Diagnostics” (or “Wireless Diagnostics”, depending on OS X version) and drag and drop it into Launchpad or the OS X Dock for easy access. WiFi Scanner runs on Mac OS X 10.6 and later, but for all features you must have 10.7 or later. When you open WiFi Scanner, you’ll see the network list and all their details on the main screen.
Use a WiFi security tool Even nowadays WiFi breaches can still happen due to policy, configuration, or simply some coding mistakes. Consistent surveillance and regular WiFi assessments are crucial for detecting wireless environment vulnerabilities. Read more: With KisMAC WiFi security app one gets to monitor a wireless network, assess vulnerability and detect an unwanted intrusion. Run the app periodically to keep track of your WiFi network safety, use the proper security settings to keep your access points secure. Create your perfect WiFi network If you are in search of tools that can help you build a perfect wireless network environment, take a look at such WiFi heatmapper as NetSpot. NetSpot is a professional app for Mac (that can be used by advanced home users too) that helps you survey a WiFi site, analyze and troubleshoot WiFi coverage and will draw heatmaps of your WiFi conveniently visualizing strong and weak spots of the network.
NetSpot offers such visualizations as Signal-to-noise ratio, Noise level, Upload/Download speed, which will help you identify possible issues with a wireless network in order to find the most optimal fix. The above mentioned possibilities are available in NetSpot PRO and NetSpot Enterprise. Free NetSpot can detect surrounding WiFi networks and display such parameters as SSID, MAC address, and Signal level in real time. With free NetSpot you can find a less crowded channel for your network to operate smoothly and with good speeds.
Wifi Scanner App
KisMAC is an open-source and free WiFi stumbler/scanner application for Mac OS X. It has an advantage over MacStumbler/iStumbler/NetStumbler in that it uses monitor mode and passive scanning. KisMAC supports several third party USB cards - USB Prism2, and USB Ralink support. All of the internal AirPort Extreme hardware is supported as well.Features:.
Reveals hidden/cloaked/closed SSIDs. Shows logged in Clients (with MAC Addresses, IP addresses and signal strengths).
Mapping and GPS support. Can draw area maps of network coverage.
PCAP import and export. Support for What's New in KisMAC. KisMAC is an open-source and free WiFi stumbler/scanner application for Mac OS X. It has an advantage over MacStumbler/iStumbler/NetStumbler in that it uses monitor mode and passive scanning. KisMAC supports several third party USB cards - USB Prism2, and USB Ralink support.