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MacOSX 10.7 ROS Installation python-eggs write permission error

asked 2012-04-15 17:25:39 -0500

RobotRoss gravatar image

updated 2012-04-16 04:01:39 -0500

Kevin gravatar image

Following Homebrew instructions on, Desktop-Full rosinstall, stops with this error message: File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/", line 928, in extraction_error raise err pkg_resources.ExtractionError: Can't extract file(s) to egg cache

The following error occurred while trying to extract file(s) to the Python egg cache:

[Errno 13] Permission denied: '/Users/Ross/.python-eggs/PyYAML-3.10-py2.7-macosx-10.7-intel.egg-tmp/tmpjfwmGh.$extract'

The Python egg cache directory is currently set to:


Perhaps your account does not have write access to this directory? You can change the cache directory by setting the PYTHON_EGG_CACHE environment variable to point to an accessible directory.

How to I set write authority to this directory or other action to allow this file to be written?

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answered 2012-04-16 04:10:35 -0500

Kevin gravatar image

"How to I set write authority to this directory or other action to allow this file to be written?"

to modify permissions:

sudo chown -R $USER {directory/file}
sudo chmod -R u+rwx {directory/file}

chown changes owner to you the user and chmod adds read/write/and execute&search to you. Please replace {directory/file} with either a directory name (and the -R will recursively change everything within) or a file name. To learn more about these commands, type:

man chown


man chmod

in a terminal window and read the man pages.

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answered 2012-04-16 16:55:34 -0500

RobotRoss gravatar image

Following this procedure worked allowing install to continue. Have another error which I'll post a new time. Tnx

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If it worked, can you mark it the question answered ... checkmark next to my post? Thanks.

Kevin gravatar image Kevin  ( 2012-04-17 15:05:27 -0500 )edit

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Asked: 2012-04-15 17:25:39 -0500

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Last updated: Apr 23 '12