I get this error when I try to install Pillow using the terminal:
pip install pillow
Collecting pillow
Downloading https://files.pythonhosted.org/packages/7e/bb/d502ae951099ce9a5a20dec21e577f304b7706321f83205c5215ebc028cd/Pillow-5.4.1-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 (3.7MB)
100% |████████████████████████████████| 3.7MB 1.3MB/s
Installing collected packages: pillow
Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '/Library/Python/2.7/site-packages/Pillow-5.4.1.dist-info'
Consider using the `--user` option or check the permissions.
What can I do to avoid this error and successfully install Pillow?