I installed CUPS 2.0.0 (cups.org) but evidently I needed to include specific architecture flags. Now several things are broken on my mac (e.g. Word won't boot). Error messages reveal that the problem is with libcups.2.dylib ("built with the wrong architecture").
Per advice I found for an earlier version of OSX, I tried re-configuring CUPS using:
configure --with-archflags="-arch i386 -arch x86_64" --with-ldarchflags="-arch x86_64"
but that did not fix the problem. What is the correct archflag for building CUPS on 10.9?
Not sure if this is related, but now I can't get the Finder to show invisible files, which is preventing me from reverting to my pre-CUPS 2.0 configuration using Time Machine.