Building FRC Gazebo Plugins for Mac OSX causing problems

[NicholasJJ]

I'm trying to set up gazebo on my mac using this guide: http://wpilib.screenstepslive.com/s/...nually-mac-osx But whenever I get to the

./gradlew -PmakeSim frc_gazebo_plugins

step I get this error message:

2 errors generated.
make[3]: *** [simulation/frc_gazebo_plugins/CMakeFiles/limit_switch.dir/limit_switch/src/external_limit_switch.cpp.o] Error 1
make[2]: *** [simulation/frc_gazebo_plugins/CMakeFiles/limit_switch.dir/all] Error 2
make[1]: *** [simulation/frc_gazebo_plugins/CMakeFiles/frc_gazebo_plugins.dir/rule] Error 2
make: *** [frc_gazebo_plugins] Error 2
:wpilibc:frc_gazebo_plugins FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':wpilibc:frc_gazebo_plugins'.
> Process 'command 'make'' finished with non-zero exit value 2

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Does anyone have any Ideas?