Desktop Freny Please Help

[BoyMadison]

I have a Apple iMac new was like back in 2013ish…..? It is running OS X 10.7.5 and has the following ports available: 3 usb ports, a firewire port, headphones, a fire wire jack ethernet jack but no HDMI. How can I connect my RCA Device to my HDMI compliant good it

 

[popatim]

What RCA device would this be?
A display of some sorts could be done with a USB graphics adapter but if your looking to connect something like a dvd player to the imac I'm afraid that's not going to happen with the ports you have available.