How to connect a new computer to an old Television
Signal path
Connect a VGA adapter to the Macbook DVI (Thunderbolt) port.
http://www.amazon.com/Tera-Grand-DisplayPort-Thunderbolt-Microsoft/dp/B006FKTR3U
Connect a VGA cable from the adapter to a PC-to-TV adapter. This converts VGA to video component (RCA plug) output. The sound from the Macbook can go through this adapter as well – it gets passed through to the RF modulator.
http://www.amazon.com/gp/product/B002PXFJ2O
Connect the PC-to-TV adapter, using RCA cables, to an RF modulator.
http://www.radioshack.com/rf-modulator/1502526.html#.VRXF67qHRbw
Connect a coaxial cable from the modulator to an RF transformer (75 to 300 ohms)
http://www.radioshack.com/matching-transformer/1501253.html#.VRXHHbqHRbw
Connect the 300 ohm leads of the matching transformer to the antenna input terminals of the TV.
references
- Max patch that was used in the demo video above : https://reactivemusic.net/?p=18455
- A video by Appyum that explains some of the process: https://youtu.be/kiU4As1j_Io