I got this works for me! There are many settings to get the TinyOS 2.1.2 up and running in the Mac machine. And the one I had here I had manage it done successfully on my Mac OSX El Capitan machine. Possibly, we can get some installation success for us but while trying to simulate on TOSSIM while running the ‘make micaz sim’ command, there are an error mess as what we got in return. But I had a successful TinyOS codes installation on TelosB motes, as well as codes installation and simulation on the MicaZ motes. So the given guide here works for both the TelosB and MICAz simulation. As it works for me, I hope it works for you too!. Any comment, simple drop me an email at: yusnaidi.kl@utm.my.