Mac testers, please download and test BOINC 7.4.19 from <http://boinc.berkeley.edu/dl/boinc_7.4.19_macOSX_i686.zip>. This is a fairly urgent fix for compatibility with the recently released CUDA version 6.5 drivers from NVIDIA. Earlier versions of BOINC won't recognize CUDA on the Mac with this driver.
This version also has compatibility fixes for the upcoming Mac OS 10.8.5 and OS 10.10 Yosemite.
Please test this version whether or not you have CUDA, and on any version of OS X.
Thanks in advance.
Cheers,
--Charlie