https://trac.macports.org/browser/trunk/dports/finance/cpuminer/Portfile
You can install it through MacPorts. MacPorts in general is a useful thing to have installed anyway.
(It should be noted that currently cpuminer is listed on MacPorts as having no maintainer, so I'm not sure how fast future updates would get submitted, although it's already ahead of first post, so that's encouraging.)