Apple actually did do voice authentication back on Mac OS 9. See http://www.gcsf.com/extras/mwj/mos9special/ (figure ten).

I assume they dropped it because it wasn't actually secure, I remember my brother getting past mine once with only a couple of tries.

Presumably we could do better today, but as far as biometrics go, I'd put my money on Windows Hello's facial recognition over voice showing up again. Apparently they've done a better job of it than the Android handsets a couple years ago managed.