lollipop package corresponds to a format (just like
pdflatex), so it is linked to the “binary” packages for the various platforms; the ones relative to the host machine are automatically installed.
On Mac OS X usually both
x86_64-darwin are installed (you can disable one of them, but it's not so space saving. In the particular case of a format like
lollipop the binary packages just create a symbolic link, so just a few bytes in the file system.
You can see it with a shell command:
> ls -l $(type -p lollipop)
lrwxr-xr-x 1 <user> wheel 6 Jun 12 2015 /usr/texbin/lollipop@ -> pdftex
because this is how preloading the formats is implemented: the
pdftex program knows the name it was called with and chooses the corresponding format.
A final comment: if you're not short of disk space, it's much better to install the full MacTeX (or TeX Live on other operating systems); life will be much easier, because manually installing packages with TeX Live Utility/
tlmgr can be time consuming as there's no “dependency tree” available.