blue:~ chintak$ virtualenv -p /usr/bin/python3 py3
The executable /usr/bin/python3 (from --python=/usr/bin/python3) does not exist
blue:~ chintak$ virtualenv -p /usr/local/bin/python3 py3
Already using interpreter /usr/local/bin/python3
Using base prefix '/Library/Frameworks/Python.framework/Versions/3.3'
New python executable in py3/bin/python3
Not overwriting existing python script py3/bin/python (you must use py3/bin/python3)
Installing Setuptools.............................................................................................done.
Installing Pip...................
  Complete output from command /Users/chintak/py3/bin/python3 setup.py install --single-version-externally-managed --record record:
  /Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/distutils/dist.py:257: UserWarning: Unknown distribution option: 'tests_require'
  warnings.warn(msg)
/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/distutils/dist.py:257: UserWarning: Unknown distribution option: 'entry_points'
  warnings.warn(msg)
/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/distutils/dist.py:257: UserWarning: Unknown distribution option: 'zip_safe'
  warnings.warn(msg)
/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/distutils/dist.py:257: UserWarning: Unknown distribution option: 'test_suite'
  warnings.warn(msg)
/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/distutils/dist.py:257: UserWarning: Unknown distribution option: 'extras_require'
  warnings.warn(msg)
usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

error: option --single-version-externally-managed not recognized
----------------------------------------
...Installing Pip...done.
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.3/bin/virtualenv", line 9, in <module>
    load_entry_point('virtualenv==1.10', 'console_scripts', 'virtualenv')()
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/virtualenv.py", line 821, in main
    symlink=options.symlink)
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/virtualenv.py", line 963, in create_environment
    install_sdist('Pip', 'pip-*.tar.gz', py_executable, search_dirs)
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/virtualenv.py", line 932, in install_sdist
    filter_stdout=filter_install_output)
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/virtualenv.py", line 899, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /Users/chintak/py3/bin/python3 setup.py install --single-version-externally-managed --record record failed with error code 1