这两天又把家里的mac的系统给重装了，重装的原因是我乐意…    其实理由很简单，本人想写个mac osx系统的使用文档，当然是初级的那种…  这尼玛还没意气风发就狼狈不堪了…

该文章写的有些乱，欢迎来喷 ! 另外文章后续不断更新中，请到原文地址查看更新。

http://xiaorui.cc/?p=3061

各种的新mac其我也用过不少，自己或帮助别人配置了不少环境…   今天就遇到一个十分纠结的问题.

就是想装个python的交互组件ipython、gevent而已….

#xiaorui.cc
sudo pip install --upgrade ipython --ignore-installed six

Exception:
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/pip/basecommand.py", line 209, in main
    status = self.run(options, args)
  File "/Library/Python/2.7/site-packages/pip/commands/install.py", line 317, in run
    prefix=options.prefix_path,
  File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 732, in install
    **kwargs
  File "/Library/Python/2.7/site-packages/pip/req/req_install.py", line 835, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "/Library/Python/2.7/site-packages/pip/req/req_install.py", line 1030, in move_wheel_files
    isolated=self.isolated,
  File "/Library/Python/2.7/site-packages/pip/wheel.py", line 376, in move_wheel_files
    clobber(source, dest, False, fixer=fixer, filter=filter)
  File "/Library/Python/2.7/site-packages/pip/wheel.py", line 315, in clobber
    ensure_dir(destdir)
  File "/Library/Python/2.7/site-packages/pip/utils/__init__.py", line 83, in ensure_dir
    os.makedirs(path)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 150, in makedirs
    makedirs(head, mode)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 150, in makedirs
    makedirs(head, mode)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 1] Operation not permitted: '/System/Library/Frameworks/Python.framework/Versions/2.7/share'

下面是pip install gevent的错误提示， 又是 Operation not permitted …

#xiaorui.cc
pip install gevent
...
    raise Error, errors
Error: [('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/__init__.py', '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/__init__.py', "[Errno 1] Operation not permitted: '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/__init__.py'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/__init__.pyc', '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/__init__.pyc', "[Errno 1] Operation not permitted: '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/__init__.pyc'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/markers.py', '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/markers.py', "[Errno 1] Operation not permitted: '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/markers.py'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/markers.pyc', '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/markers.pyc', "[Errno 1] Operation not permitted: '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib/markers.pyc'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib', '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib', "[Errno 1] Operation not permitted: '/tmp/pip-jlyjj9-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/_markerlib'")]

其实权限问题… OSError: [Errno 1] Operation not permitted ,   各种的root都不可以，想到了一个粗暴的方式，直接针对share进行chmod的授权。  结果… 提示root也是没有权限操作系统的目录。   我突然发觉肯定是新版的osx有了某种机制制止我们直接的修改/System文档数据。 

google了后，发现果然如我的所料….  新系统有个叫sip的机制。 你暂时不能直接在终端进行 csrutil disable 会出现错误提示，引导你去mac osx的恢复模式进行操作。 

由于El Capitan引入了SIP机制(System Integrity Protection)，默认下系统启用SIP系统完整性保护机制，无论是对于硬盘还是运行时的进程限制对系统目录的写操作。 这也是我们安装ipython失败的原因….

现在的解决办法是取消SIP机制，具体做法是：

重启电脑，按住Command+R(直到出现苹果标志)进入Recovery Mode(恢复模式)
左上角菜单里找到实用工具 -> 终端
输入csrutil disable回车
重启Mac即可
如果想重新启动SIP机制重复上述步骤改用csrutil enable即可

我们现在再看看sip的状态, 这样再安装ipython、gevent再也不会提示无法写入的权限提示了/

$ csrutil status
System Integrity Protection status: disabled.

如果在mac下碰到OSError: [Errno 1] Operation not permitted:的问题，就算用sudo 也无法解决，那肯定是sip在作怪了.

胡阳大哥给出一个优雅的方案，大家可以使用下. 基于用户的权限来安装模块包显得更加合理。 

pip install ipython --user -U

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