I thought DMS did a nice job with this video analysing the power output from a M2 MacBook Pro headphone jack:
From my own experience I would mostly agree with his findings, while not adequate for some headphones, the extra power from the updated MacBook Pro headphones jacks will work well for a significant number of headphones without the need for a desktop headphone DAC.
From my own experience I would mostly agree with his findings, while not adequate for some headphones, the extra power from the updated MacBook Pro headphones jacks will work well for a significant number of headphones without the need for a desktop headphone DAC.