does MacBook Pro need a DAC?


Not an engineer with a basic question. Just got a new MacBook Pro. It has AudioMIDI setup with format up to 96k hz.
I am using it by plugging in a cable into a headphone jack with the other end going into the receiver. A friend suggested I get a DAC. but I don't see what purpose would an additional DAC serve. Isn't my MacBook Pro already converting digital to analog signal? and is it doing it efficiently? enough for high quality reproduction? thanks in advance to all who respond
petar3
Modi 3!
What an excellent bang for the buck product.
Maybe one of the best buys currently out there.

Enjoy!
Is there an equivalent to the Dragonfly - compact quality converter - but for audio in (microphone)?