[OS X TeX] Where to get MacTeX-2013?

[Alain Schremmer]

Since I cannot compile with MacTeX-2015 under Yosemite files which compile just fine with MacTeX-2013 under Snow Leopard, my last attempt before I ditch Yosemite and the Mid 2011 Mac Mini it is on was to try to install MacTeX-2013 but I could not find it. Does it still exist somewhere?

(I found TeX Live 2013 but have no idea how to install it.)

Hopeful regards. 
--schremmer