From: Jason Swails <>
Date: Sat, 16 May 2015 12:30:17 -0400

On Sat, May 16, 2015 at 9:05 AM, George Tzotzos <> wrote:

> Thank you Jason,
> I’ll try what you suggested. I have one question.
> The installation of Python 2.7 via MacPorts will place it in
> /opt/local/bin.
> Should I remove then the native MacOS installations in /usr/bin (i.e.
> python2.6, python2.7)?

​No no​ no​ no​ no​ no​ no​ no​ no​ no​ no​ no​ no​ no​ no​ no​ no​ no​
 :). You will break your operating system. *never* delete a system Python
(Windows doesn't have one, but all Linux and Mac ones do), since you have
no idea what system-critical programs depend on it. For instance, I think
a lot of package managers are either written entirely in Python or have
critical components written in Python.

> Wouldn’t there be conflicts having python installed in two different
> directories?

​No. In fact, I have probably over a dozen different Python interpreters
on my computer with different versions and installed packages.​

And a trivial one just to satisfy my curiosity.
> How come that I did not encounter this problem in the amber parallel
> installation on the Mac Pro?

​I couldn't tell you without poking around the computer myself. It could
be that you already had a /opt/local/bin/python. It could be that your Mac
Pro runs OS X Server and only builds x86_64-compatible binaries... who

All the best,

Jason M. Swails
Rutgers University
Postdoctoral Researcher
AMBER mailing list
Received on Sat May 16 2015 - 10:00:02 PDT
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