In the WiFi list, I see full signal for my WiFi. Since I'm quite far away from the access point and the WiFi works poorly, I double checked the signal strength with WiFi Diagnostics. This tool tells me – no surprise – that I have a weak signal.
The symbol indicates full signal strength, even though I have a week signal. What is this symbol good for then?
Best Answer
it is just a bug of the icon at manu bar, if logging out and back is not working or even rebooting your mac, try this:
source: Mac Forums