[0xDEAFBEAD]

I believe there are a few projects like that:

https://elementary.io/

https://pearos.xyz/

https://ubuntubudgie.org/

Probably better to select and contribute to one rather than starting your own

[cosmic_cheese]

Unfortunately those are all so far from replicating a macOS experience that the work needed to fill the gaps is about as much as would be needed starting from scratch. Resemblances in all three are surface level at best, and are far from complete even in that aspect.