None of the current routes for gen 1 Pokemon (except for any% classic) work on 3DS because you can't hard-reset on 3DS for the RNG manip

Not for glitched categories, and not if you do the RNG manip.

So because the new RNG manip doesn't work accurately on Gambatte, I need to use BGB. The only problem is that I use a Mac. I know that it's possible to run BGB on Mac, but I can't find out how. Can anyone help me with this?

I don't think those notes exist anymore.