usbtinyisp leb cube and ATmega16-16PU help please

hello, first sorry for my english i"m french i m working with light on gdma on concert etc ...but i m really beginner in programmation and i need help i ve made a led cube 4x4x4 http://www.instructables.com/id/LED-Cube-4x4x4/ i found the usb tiny isp kit V2,0 and made it i made the cube but i thank that was really more easier than what i saw today to compile and use it so i m really lost my question how to use it on a mac ? i found some explications on http://www.ladyada.net/learn/avr/setup-mac.html i was lost at step 3 can t find usr/local/etc the only one can found home/java/bin and download osx avr if someone has time to lost with me, sorry to busy you have a good day !