首先声明，我是新手程序员，对mac osx和bash都不熟悉。
我在我的Mac osx 10.7.3上安装virtualenvwrapper遇到了麻烦。很明显是路径设置的问题，但我一直无法使其正常工作。
在.bashrc文件中设置virtualenvwrapper
export WORKON_HOME=$HOME/.Apps
source /usr/local/bin/virtualenvwrapper.sh
一些终端输出:
which easy_install
/usr/bin/easy_install
python -V
Python 2.7.1
当我在终端中运行"source .bashrc"时，没有任何输出。
当我在终端中运行mkvirtualenv时，我会得到以下输出：
Error [Errno 2] No such file or directory while executing command install_name_tool -change /System/Library/Fram.../Versions/2.7/Python @executable_path/../.Python 1/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 9, in <module>
load_entry_point('virtualenv==1.7.1.2', 'console_scripts', 'virtualenv')()
File "/Library/Python/2.7/site-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 928, in main
never_download=options.never_download)
File "/Library/Python/2.7/site-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 1029, in create_environment
site_packages=site_packages, clear=clear))
File "/Library/Python/2.7/site-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 1347, in install_python
py_executable])
File "/Library/Python/2.7/site-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 966, in call_subprocess
cwd=cwd, env=env)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 672, in __init__
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1202, in _execute_child
OSError: [Errno 2] No such file or directory