In case you are wondering about the signal quality of your WiFi (WLAN) there’s an easy check for that. Just press the alt-key while you click on the AirPort status symbol in the menu bar with your mouse. Now you can see the “Transmit Rate”. The rate will vary depending on your wireless protocol (802.11 a/b/g/n) and other factors. But at least you know if you’re getting the full possible signal strength or if you should change your setup to improve the signal. 802.11g should give you speeds of 54 Mbps max and 802.11n either 130 or 300 Mbps max, depending on your n-specifications.