Apple's MacBooks can easily be the centre of a pro music studio. As we have seen they have the power you need - easily matching most desktop machines - but also the portability which means you can make music anywhere and any time.
In terms of the laptop size, you can go truly portable with an amazingly sleek 13-inch Air, or go for the top-end Pro and get a more usable 16-inch screen. The bigger the machine, the less portable, obviously, but we have found that using our 13-inch Air M2 has been a little restrictive on occasion, particularly with VST instruments where you can't adjust the size.
Otherwise, every MacBook will deliver a fantastic music production experience. You can opt for Logic as your main Digital Audio Workstation, a Mac only DAW which gives more bang for buck than any other music application out there. Or you can use pretty much every other DAW or software instrument - most music applications are Mac compatible and run very smoothly on MacBooks.