The Performance window shows you information about the Wi-Fi signal your Mac is receiving.

Change the Wi-Fi channel on your router to get a faster, more reliable wireless signal. More usefully, it’ll inform you which Wi-Fi channels would be the best ones for your router. You can see a list of nearby Wi-Fi networks along with their security, protocol, and signal details. The Scan toll will scan for nearby Wi-Fi networks and display a list of. Be sure to disable background-logging after you’re done using it if you actually need to enable this logging-feature. This is useful if you need to monitor something, but you shouldn’t leave logging enabled all the time - it’s unnecessary and a waste of resources. You can then close the Wireless Diagnostics tool and your Mac will continue collecting logs in the background. The Logs utility allows you to enable automatic background-logging of various network-related things, including Wi-Fi, 802.1X, DHCP, DNS, Open Directory, and Sharing.

You can also just hold down the Option key and click the Wi-Fi icon on your menu bar to view much of this information without opening the Wireless Diagnostics tool. This is where you can find details like your IP address, MAC address, and other network information. The Info tool shows a variety of details about your network connection, Wi-Fi interface, and even Bluetooth status.

How to check wifi on mac