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You likely already have it. Skia has been pre-installed in Mac operating systems since System 7.5 (1994). You can find the various weights, including bold and black variations, within standard Apple applications like TextEdit or via the Font Book.
The original version allowed users to adjust sliders to transition seamlessly between "Thin" and "Black" weights. Skia Black Font Free Download
It features open counters, a large x-height, and distinctly angled terminals that give it a clean yet organic look. You likely already have it