Unable to disconnect from iPhone Personal Hotspot I can connect to my iPhone hotspot through Wi-Fi on my MacBook Air, but when I then click "Disconnect from my iPhone" in the Wi-Fi menu, nothing happens.

The only method I could use disconnect is to disable Personal Hotspot on the iPhone itself. 

Disconnecting on my MacBook used to work prior to upgrading to OS X 10.11, El Capitan. Any idea of a fix?
I solved my problem following bmike's instructions: I rebooted my computer!