其scikit-image下载说：
pip install -U scikit-image
或
easy_install -U scikit-image
，但两者都失败了，无论标志u如何，如下所示：
Georgioss-MacBook-Pro:Downloads gsamaras$ sudo pip install scikit-image
The directory '/Users/gsamaras/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/gsamaras/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting scikit-image
Downloading scikit_image-0.12.3-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (22.2MB)
100% |████████████████████████████████| 22.2MB 53kB/s
Requirement already satisfied: dask[array]>=0.5.0 in /Library/Python/2.7/site-packages (from scikit-image)
Collecting six>=1.7.3 (from scikit-image)
Downloading six-1.10.0-py2.py3-none-any.whl
Collecting networkx>=1.8 (from scikit-image)
Downloading networkx-1.11-py2.py3-none-any.whl (1.3MB)
100% |████████████████████████████████| 1.3MB 133kB/s
Requirement already satisfied: pillow>=2.1.0 in /Library/Python/2.7/site-packages (from scikit-image)
Requirement already satisfied: numpy; extra == "array" in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from dask[array]>=0.5.0->scikit-image)
Requirement already satisfied: toolz>=0.7.2; extra == "array" in /Library/Python/2.7/site-packages (from dask[array]>=0.5.0->scikit-image)
Collecting decorator>=3.4.0 (from networkx>=1.8->scikit-image)
Downloading decorator-4.0.10-py2.py3-none-any.whl
Installing collected packages: six, decorator, networkx, scikit-image
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-9.0.1-py2.7.egg/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/commands/install.py", line 342, in run
prefix=options.prefix_path,
File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_set.py", line 778, in install
requirement.uninstall(auto_confirm=True)
File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 754, in uninstall
paths_to_remove.remove(auto_confirm)
File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_uninstall.py", line 115, in remove
renames(path, new_path)
File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/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: '/tmp/pip-qlMJKP-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/six-1.4.1-py2.7.egg-info'
Georgioss-MacBook-Pro:Downloads gsamaras$
和：
Georgioss-MacBook-Pro:Downloads gsamaras$ sudo easy_install scikit-image
Searching for scikit-image
Reading https://pypi.python.org/simple/scikit-image/
Best match: scikit-image 0.12.3
Downloading https://pypi.python.org/packages/86/d0/b0192dc9a544da90f2d9150bcd84b981c6873e42a1f752b6affb89180ad8/scikit-image-0.12.3.tar.gz#md5=04ea833383e0b6ad5f65da21292c25e1
Processing scikit-image-0.12.3.tar.gz
Writing /tmp/easy_install-X6Pjoh/scikit-image-0.12.3/setup.cfg
Running scikit-image-0.12.3/setup.py -q bdist_egg --dist-dir /tmp/easy_install-X6Pjoh/scikit-image-0.12.3/egg-dist-tmp-lHJxkL
Killed: 9
请注意，brew也失败了，找不到它。
我有Python 2.7.10，Matplotlib 1.3.1，PIL 3.4.2和Scipy'0.18.1'。该怎么办？
通常在系统范围内安装库是一个坏主意。代替每个项目使用Virtualenv。
首先在Mac上全球安装Virtualenv：
$ [sudo] pip install virtualenv
然后使用virtualenv命令创建python可执行文件的新（副本）：
$ cd your/prefred/folder
$ virtualenv your_project
激活 virtualenv ：
$ source your_project/bin/activate
您的Virtualenv是创建和激活的（更改了提示以显示激活）。您可以在其中安装任何内容：
$ pip install -U scikit-image
pip install scikit-image
pip install --upgrade scikit-image
致电使用skimage
（将其作为答案输入以包含错误消息）。使用@Krackle的第一个答案，我在这里添加以帮助他人的以下（令人困惑的）输出：
pip install skimage
Collecting skimage
Using cached skimage-0.0.tar.gz (757 bytes)
ERROR: Command errored out with exit status 1:
command: /opt/anaconda3/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/ft/7j605bsd10l0ftqygyxjjflh0000gq/T/pip-install-xtxr1328/skimage/setup.py'"'"'; __file__='"'"'/private/var/folders/ft/7j605bsd10l0ftqygyxjjflh0000gq/T/pip-install-xtxr1328/skimage/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'rn'"'"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /private/var/folders/ft/7j605bsd10l0ftqygyxjjflh0000gq/T/pip-pip-egg-info-q8dwl8rl
cwd: /private/var/folders/ft/7j605bsd10l0ftqygyxjjflh0000gq/T/pip-install-xtxr1328/skimage/
Complete output (3 lines):
*** Please install the `scikit-image` package (instead of `skimage`) ***
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
i然后使用 @krackle的第二个命令（到目前为止）解决了问题。