i can't seem to add contributed libraries to my projects. when i first downloaded processing, i was able to successfully add the minim sound library. i think i must have changed something (like a file path) because when i try to add additional libraries (i'm specifically interested in the saito .obj loader) i can't load them at all even when i follow the instructions on the wiki exactly. as an experiment i tried deleting the minim library in order to deduce where the correct place was. mysteriously, after doing so, i was still able to use it to create sound. there must be a (hidden?) folder that i'm missing.

i think i even tried deleting processing from my computer with all my files (after backing them of course) and reinstalling it. i still ran into the same problem.  

so, where is this directory, or whatever it is? 

i have a mac. i'm also working out of the processing handbook by ben fry and casey reas....

please help!

thanks