digital to analog converter

i just got a new sony tv with optical audio out.  what should i get to connect it to my surround sound mcintosh mx 130 a/v control center.?
Best answer:  Replace it with an HDMI 2 capable processor or AVR and use HDMI/Audio Return Channel.

Cheapest answer:  Get a Topping 2 channel DAC and optical S/PDIF cable.
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S Video?
Who you crappin’?
The only valid answers you’ll get about what is possible will come from Mac.
Personally I wouldn’t bother.
I hardly ever mess with watching surround sound on my Sony TV’s.
Super Bowl excepted.
Good luck with that.