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I just bought a Macbook Air M1 a few days ago (new, decent deal). I'll probably enter Apple dev program thing so I can sign MM 1.0 and Mac users no longer have Gatekeeper messages as first experience.
As for videos, I guess you're confusing with Arnklit who did many great videos about MM (I focus on coding and don't create videos), and also contributed quite a few nodes. And you may also want to check his "river" addon for Godot.