In Mavericks at least, you can hold Option and click on the Wifi icon in the menu bar to get an "Open Wireless Diagnostics" option in the menu. And you're right

In Mavericks at least, you can hold Option and click on the Wifi icon in the menu bar to get an "Open Wireless Diagnostics" option in the menu. And you're right -- it's pretty handy when you're surrounded by college apartments that all have their own routers.