CouchDBX is the simplest way to get CouchDB running on your Mac:
CouchDBX is now proudly sponsored by Couchio and available on http://www.couchbase.com/downloads/couchbase-single-server/community
Feeling adventurous? Lincoln Stoll provides nightly builds of CouchDBX. Be aware that these may be broken and may not work as intended. If you run into problems with a nightly build, go back and try a stable release.
No Longer Available
CouchDBX is an unofficial release of Apache CouchDB. It only supports Intel-based Macs running Mac OS X 10.5 Leopard or newer.
CouchDBX bundles Apache CouchDB, ICU, Spidermonkey & Erlang. CouchDBX itself is Open Source under the Apache License 2.0.
CouchDBX is brought to you by Jan Lehnardt, Geoffrey Grosenbach & Jon Gretar.