cannot see plot (missing backend?) mac os yosemite

[floswald]

there is no popup window with a plot for me here after a fresh install. any ideas?

               _
   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: http://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.5.0 (2016-09-19 18:14 UTC)
 _/ |\__'_|_|_|\__'_|  |  Official http://julialang.org/ release
|__/                   |  x86_64-apple-darwin13.4.0

julia> ENV["PTYHON"] = ""
""

julia> Pkg.add("PyPlot")
INFO: Installing Conda v0.4.0
INFO: Installing LaTeXStrings v0.2.0
INFO: Installing PyCall v1.7.2
INFO: Installing PyPlot v2.2.4
INFO: Building Conda
INFO: Building PyCall
Fetching package metadata .......
Solving package specifications: ..........

# All requested packages already installed.
# packages in environment at /Users/florian.oswald/.julia/v0.5/Conda/deps/usr:
#
numpy                     1.11.2                   py27_0  
INFO: PyCall is using /Users/florian.oswald/.julia/v0.5/Conda/deps/usr/bin/python (Python 2.7.12) at /Users/florian.oswald/.julia/v0.5/Conda/deps/usr/bin/python, libpython = /Users/florian.oswald/.julia/v0.5/Conda/deps/usr/lib/libpython2.7
INFO: Package database updated

julia> using PyPlot
INFO: Precompiling module PyPlot.
/Users/florian.oswald/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.
  warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')

julia> plot(rand(10))
1-element Array{Any,1}:
 PyObject <matplotlib.lines.Line2D object at 0x325e474d0>

julia> PyPlot.version
v"1.5.1"

[floswald]

➜  ~ cat ~/.matplotlib/matplotlibrc 
backend : MacOSX