mac osx: unable to use virtualenv

I'm trying to create an environment using virtualenv.

virtualenv test
New python executable in test/bin/python
Error [Errno 2] No such file or directory while executing command install_name_tool -change /System/Library/Fram.../Versi开发者_StackOverflow社区ons/2.6/Python @executable_path/../.Python test/bin/python
Could not call install_name_tool -- you must have Apple's development tools installed
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 8, in <module>
    load_entry_point('virtualenv==1.6.4', 'console_scripts', 'virtualenv')()
  File "/Library/Python/2.6/site-packages/virtualenv-1.6.4-py2.6.egg/virtualenv.py", line 810, in main
    never_download=options.never_download)
  File "/Library/Python/2.6/site-packages/virtualenv-1.6.4-py2.6.egg/virtualenv.py", line 901, in create_environment
    site_packages=site_packages, clear=clear))
  File "/Library/Python/2.6/site-packages/virtualenv-1.6.4-py2.6.egg/virtualenv.py", line 1166, in install_python
    py_executable])
  File "/Library/Python/2.6/site-packages/virtualenv-1.6.4-py2.6.egg/virtualenv.py", line 843, in call_subprocess
    cwd=cwd, env=env)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 595, in __init__
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 1106, in _execute_child
OSError: [Errno 2] No such file or directory

Folder is created alright, but files like activate are missing. Anyone? (I have xcode 3.2.3 installed. running python 2.6, osx 10.6.8)

Your developer tools are not installed correctly. I recommend installing Xcode 4.

I had the same error messages trying to run virtualenv on a up-to-date Max OS X Lion (10.7.2) installation with XCode installed and very up-to-date using the App Store.

I missed the /usr/bin/install_name_tool as well, however it is there in the system. Use the terminal in the following code blocks.

 $ locate install_name_tool
 /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/install_name_tool
 /Developer/usr/bin/install_name_tool
 /Developer/usr/share/man/man1/install_name_tool.1

I made a simlink from the /Developer/usr/bin to the /usr/bin with

 $ sudo ln -s /Developer/usr/bin/install_name_tool /usr/bin/install_name_tool

Entering the 'which' command yields:

 $ which install_name_tool
 /usr/bin/install_name_tool

After that I did the virtualenv magic

$ virtualenv -p python2.6 myvirtenv
Running virtualenv with interpreter /opt/local/bin/python2.6
New python executable in myvirtenv/bin/python
Installing setuptools............................done.
Installing pip...............done.

Works like a charm now!

Use install_name_tool from @gregglind's fork of virtualenv:

git clone https://github.com/gregglind/virtualenv.git
cd virtualenv
git checkout feature/install_name_tool
sudo python setup.py install

Credits: macdhuibh (https://github.com/pypa/virtualenv/issues/7)

Get the XCode Command line tools from here:

https://developer.apple.com/downloads/index.action?name=for%20Xcode%20-#

I just fresh installed Lion, and installed XCode from the App Store - and these didn't get installed at the same time, need a separate install now I guess...