问无法调用install_name_tool

EN

New python executable in SUPENV/bin/python
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 SUPENV/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/2.7/site-packages/virtualenv-1.6.4-py2.7.egg/virtualenv.py", line 810, in main
never_download=options.never_download)
  File "/Library/Python/2.7/site-packages/virtualenv-1.6.4-py2.7.egg/virtualenv.py", line 901, in create_environment
site_packages=site_packages, clear=clear))
  File "/Library/Python/2.7/site-packages/virtualenv-1.6.4-py2.7.egg/virtualenv.py", line 1166, in install_python
py_executable])
  File "/Library/Python/2.7/site-packages/virtualenv-1.6.4-py2.7.egg/virtualenv.py", line 843, 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