Thanks to Matt Denwood, we now have a binary distribution of JAGS 3.4.0 for Mac OS X Mavericks. There is a separate binary for older Mac OS X releases (Snow Leopard, Lion, Mountain Lion). Both binary packages can be downloaded from the files page.

[*Update 2014-09-11*] The rjags package for Mavericks is now available from CRAN. To make it work, you need to have the right combination of R and JAGS:

- If you installed the R-3.1.1-mavericks.pkg version of R then you need to install JAGS-Mavericks-3.4.0.dmg
- If you installed the R-3.1.1-snowleopard.pkg version of R then you need to install JAGS-SnowLeopard-3.4.0.dmg

If you get an error about a **missing symbol** then you have the wrong combination of R and JAGS.

If you are still having problems, come to the JAGS forums.