USB Port not showing in Arduino IDE 1.6.5 on Mac os X - 10.10.5 Yosemite

Hello,

I attached Arduino UNO through cable to my MAC running 10.10.5 Yosemite but problem is that, ARDUINO IDE is not showing port of usb in list.

Anybody can guide me where i am wrong.

Thank you.

Are you using an Arduino UNO clone for which you need a USB driver? What does the chip near the USB connector say on it?