Problem with matplotlib when installing QGIS on mac

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I have matplotlib installed on a Mac (Mavericks) via pip, which means the matplotlib files get installed under /System/Library/...

I tried installing the most recent version of QGIS, and the install fails because it can't find matplotlib. I'm thinking this is because I didn't use easy_install, which appears to put packages instead under /Library/...

Is there an easy way to tell QGIS to look for packages under /System/Library - is it merely a matter of setting some environment variable that QGIS looks at ?

thanks !

Update:

• I'm installing QGIS from the .dmg package provided at kyngchaos.com
• the error message started when I double click the .dmg to install it. I get a popup complaining that matplotlib is not installed even though it is installed and command line python can see it.

I believe (based on other notes at kyngchaos.com) that the difference is because of my use of python.org python and pip instead of system python, and the different place that libraries are placed in.



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