Just a heads up for all OSX modders,
I've been following the great tutorials located in TheGreyGhost's MinecraftByExample Github repo (https://github.com/TheGreyGhost/MinecraftByExample). When loading up the mod into eclipse after performing the ForgeGradle build, example "mbe14_item_camera_transforms" will show errors that the getX, getY, and getZ methods are missing from the Vector3f class.
This is because OSX ships with an outdated version 1.3 vecmath.jar and the getXYZ methods were implemented in version 1.5. This is simple to fix by replacing or renaming the Apple-provided vecmath.jar file located in /System/Library/Java/Extensions with an updated version 1.5 vecmath.jar file.
Edit: It appears Forge comes with the updated version of vecmath, if someone can elaborate on how to prioritize it over the system-provided file that would be peachy. Otherwise I'll be looking into that.