I'm working on getting Python installed on my Mac 10.5.8 and I have been having a heck of a lot of trouble.

The standard downloads at Python.org do not show a compatible version.

  • They have 10.3 - 10.6 for 32 bit
  • They have 10.6 - 10.7 for 64 bit

I tried downloading and installing the 32 bit version for 10.5, yet when launching the IDLE, it "Unexpectedly" quits.

I've been told that Python comes pre-installed on Mac OSX computers, but when running "python" in the terminal I receive this error:

william-johnsons-macbook:~ Will$ python
dyld: unknown required load command 0x80000022
Trace/BPT trap
william-johnsons-macbook:~ Will$ 

If anyone has any advice or other references not on the python.org site, I would really appreciate it.

  • 1
    The binaries on python.org aren't really the best way to install python on OS X. You should really be using homebrew anyway: mxcl.github.com/homebrew
    – Aaron Gallagher
    Commented Sep 17, 2011 at 16:52
  • @AaronGallagher can you give any reason for that? the Apple python maillist suggests the python one over packages + homebrew should end up the same as the python.org one
    – mmmmmm
    Commented Sep 24, 2011 at 19:21
  • @user950280 - if you get that at the prompt you have a broken install - what does which python show or /usr/bin/python
    – mmmmmm
    Commented Sep 24, 2011 at 19:22

2 Answers 2


It's been a long time since I had to do this for 10.5.8, but I followed these instructions: http://web.archive.org/web/20090508090926/http://blog.captnswing.net/2009/04/19/python-mod_wsgi-64bit-mac-os-x-105/ (note that the original website is gone, hence the WayBack link)

Here's a post I made on the topic back when I was trying: http://buffalothedestroyer.blogspot.com/2009/04/python-64-bit.html

But, do you need 64 bit python on 10.5.8? Frankly, I don't think it's worth the pain - I'd pay a few bucks and upgrade to 10.6 or 10.7.

If it's just a problem with 32-bit python, which python are you using? (i.e., what does which python return?)


What's about python from MacPorts? it is the same as from Python.org, but for your architecture and you can manage libs more easily.

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