Mac Infrared

Is there any possibility to read the Infrared-Interface of the iMac?

I tried the serial.list() but this shows only some Bluetooth-Serial (but even NO USB!, that confused me!).

Is there an other way to read this out, or am I doing something wrong with the Serial-Library?

(If you need these information: I have a mid 2011 iMac 3,1 GHz i5 QuadCore with Mac OSX Lion 10.7.3).

thanks a lot for your help,

Frederik.Dotcom