Because of OSX bugs and features; built from the excellent CCID free software driver sources, the "official unofficial":
libtool
, autoconf
, automake
and pkg-config
from Homebrew/MacPorts/Fink)
git clone --recursive https://github.com/martinpaljak/osx-ccid-installer
make -C osx-ccid-installer
make SIGNER="XXX"
XXX
is the personal part of a Developer ID certificate common name, such as Martin Paljak
or Martin Paljak (9ME8T34MPV)
security find-identity -v -p codesigning