SW4STM32 in OS X
Please refer to http://www.erikandre.org/2015/09/getting-started-with-openstm32-on-osx.html
I am currently running a workshop on embedded systems and the Mac users in the class are using these instructions to get their tool sets working. Mine works very nicely. Although the updating to El Capitan has messed up the openOCD connection so that only works once, then you have to unplug/replug to have it work again.