How to add iPhone USB to Network Interface on iMac? Please help.

Hi,

I've been trying to find a solution of the past few days to no avail. I've accidentaly deleted iPhone USB from network interface (by pressing minus sign) and now my iMac won't see it. I wanted to tether via USB, but it was red before, and then I deleted it at all 😟 iTunes sees it and syncing is working, but I can't tether now. I've got iTunes 11.1.2 and newest iOS for iPhone 5S.

Thank you in advance!