我无法在macOS Sierra上安装带有pip的ipython。在安装结束时，我遇到了麻烦。有一个错误号为1的OSError（不允许应用）。是否有pip的问题？我有两个python在我的Mac上2和3。
pip install ipython
Collecting ipython
Using cached ipython-5.4.1-py2-none-any.whl
Collecting prompt-toolkit<2.0.0,>=1.0.4 (from ipython)
Using cached prompt_toolkit-1.0.14-py2-none-any.whl
Collecting decorator (from ipython)
Using cached decorator-4.0.11-py2.py3-none-any.whl
Requirement already satisfied: setuptools>=18.5 in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from ipython)
Collecting pickleshare (from ipython)
Using cached pickleshare-0.7.4-py2.py3-none-any.whl
Collecting pygments (from ipython)
Using cached Pygments-2.2.0-py2.py3-none-any.whl
Collecting pexpect; sys_platform != "win32" (from ipython)
Using cached pexpect-4.2.1-py2.py3-none-any.whl
Collecting pathlib2; python_version == "2.7" or python_version == "3.3" (from ipython)
Using cached pathlib2-2.2.1-py2.py3-none-any.whl
Collecting backports.shutil-get-terminal-size; python_version == "2.7" (from ipython)
Using cached backports.shutil_get_terminal_size-1.0.0-py2.py3-none-any.whl
Collecting simplegeneric>0.8 (from ipython)
Using cached simplegeneric-0.8.1.zip
Collecting traitlets>=4.2 (from ipython)
Using cached traitlets-4.3.2-py2.py3-none-any.whl
Collecting appnope; sys_platform == "darwin" (from ipython)
Using cached appnope-0.1.0-py2.py3-none-any.whl
Collecting six>=1.9.0 (from prompt-toolkit<2.0.0,>=1.0.4->ipython)
Using cached six-1.10.0-py2.py3-none-any.whl
Collecting wcwidth (from prompt-toolkit<2.0.0,>=1.0.4->ipython)
Using cached wcwidth-0.1.7-py2.py3-none-any.whl
Collecting ptyprocess>=0.5 (from pexpect; sys_platform != "win32"->ipython)
Using cached ptyprocess-0.5.1-py2.py3-none-any.whl
Collecting scandir; python_version < "3.5" (from pathlib2; python_version == "2.7" or python_version == "3.3"->ipython)
Using cached scandir-1.5.tar.gz
Collecting enum34; python_version == "2.7" (from traitlets>=4.2->ipython)
Using cached enum34-1.1.6-py2-none-any.whl
Collecting ipython-genutils (from traitlets>=4.2->ipython)
Using cached ipython_genutils-0.2.0-py2.py3-none-any.whl
Installing collected packages: six, wcwidth, prompt-toolkit, decorator, scandir, pathlib2, pickleshare, pygments, ptyprocess, pexpect, backports.shutil-get-terminal-size, simplegeneric, enum34, ipython-genutils, traitlets, appnope, ipython
Found existing installation: six 1.4.1
DEPRECATION: Uninstalling a distutils installed project (six) has been deprecated and will be removed in a future version. This is due to the fact that uninstalling a distutils project will only partially uninstall the project.
Uninstalling six-1.4.1:
Exception:
Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/Library/Python/2.7/site-packages/pip/commands/install.py", line 342, in run
prefix=options.prefix_path,
File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 778, in install
requirement.uninstall(auto_confirm=True)
File "/Library/Python/2.7/site-packages/pip/req/req_install.py", line 754, in uninstall
paths_to_remove.remove(auto_confirm)
File "/Library/Python/2.7/site-packages/pip/req/req_uninstall.py", line 115, in remove
renames(path, new_path)
File "/Library/Python/2.7/site-packages/pip/utils/__init__.py", line 267, in renames
shutil.move(old, new)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 302, in move
copy2(src, real_dst)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 131, in copy2
copystat(src, dst)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 103, in copystat
os.chflags(dst, st.st_flags)
OSError: [Errno 1] Operation not permitted: '/var/folders/ws/yr231f3x1n3gh1lt85c0m4fm0000gn/T/pip-ViwdCl-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/six-1.4.1-py2.7.egg-info'