macos tbb too big for gmail

I can imagine two options:

A) Figure out how to make it smaller. What got so big about it? Do some of its components include two different archs but not need to? Is something not stripped that should be, or we have extra debugging symbols in?

B) Split it into two pieces. (I don't think we need to split it into 20 pieces -- that can't be fun to download.) This would be a sad choice to make, since it adds complexity for the receiving user. But if "A" doesn't do it, then "B" is it.

Unless there's a third option we should explore?