Mac 指定不了virtualenv Python版本

Question

刚拿Mac用Python不久 遇到一个创建虚拟环境却指定不的问题：

> 创建虚拟环境
wumengtiandeMacBook-Pro:web wumengtian$ virtualenv virtual
New python executable in /Users/wumengtian/Desktop/web/virtual/bin/python
Installing setuptools, pip, wheel...done.
> 指定版本
wumengtiandeMacBook-Pro:web wumengtian$ virtualenv virtual --python=python3
Running virtualenv with interpreter /usr/local/bin/python3
dyld: Library not loaded: @executable_path/../.Python
  Referenced from: /usr/local/bin/python3
  Reason: image not found

电脑安装了Python2和Python3 路径为：

wumengtiandeMacBook-Pro:~ wumengtian$ which python
/usr/bin/python
wumengtiandeMacBook-Pro:~ wumengtian$ which python3
/usr/local/bin/python3

请问各位朋友 是哪里出问题了？Path吗？小弟先谢过各位了

Answer 1

没那么麻烦吧？说说我怎么弄得请参考：
1 pip install virtualenv
2 pip install virtualenvwrapper
3 'mkvirtualenv -p python3 env1' #创建Python版本为3的虚拟环境env1
4 'mkvirtualenv -p python3 env2' #创建Python版本为3的虚拟环境env2

Answer 2

重新安装python3，或者brew upgrade python3