I\'m using virtualenv-1.4.5 on Mac OS X 10.6.2 (Xcode is installed) and Python 2.6. Here\'s what I get when I attempt to run a virtualenv...
Mac-Pro:pylonsd
I had the same error messages trying to run virtualenv on a up-to-date Max OSX Lion installation with XCode installed.
However: Mark hints on Mar 1 2010:
Well code says you have not installed Xcode but you say you have. What does which install_name_tool at the command line say? It should be install_name_tool -> install_name_tool == /usr/bin/install_name_tool
I had the same problem. I had installed the latest Xcode in Lion (10.7.2).
$ 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.