Serial connection from a 2011 iMac

Having spent a month or two with my Uno on a shelf, i decided to get it out and give it another try. When i used it before i had no issue with connecting it and uploading sketches, however now when i click the serial port option i only get two for bluetooth pda sync and two for bluetooth modem. I tried booting into my windows partition and i only get an option called COM4.

Considering the fact that i had this working before, could it be an issue with my board? I tired connecting it to my brothers macbook pro and that had the same problem.