Error when attempting package install in latest Mac version ( [Errno 30] Read-only file system )

smm

import pip

pip.main(['install', 'opencv-python'])

Yields the error:

Collecting opencv-python
  Downloading https://files.pythonhosted.org/packages/ae/f7/01fc83414fbdbb470d6d77ee4a0fd32234046edc4a2e4f7897e3e95ee666/opencv_python-3.4.2.17-cp27-cp27m-macosx_10_6_x86_64.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (42.2MB)
Requirement already satisfied: numpy>=1.11.1 in /private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages (from opencv-python)
Installing collected packages: opencv-python
Exception:
Traceback (most recent call last):
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/commands/install.py", line 342, in run
    prefix=options.prefix_path,
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/req/req_set.py", line 784, in install
    **kwargs
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/req/req_install.py", line 851, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/req/req_install.py", line 1064, in move_wheel_files
    isolated=self.isolated,
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/wheel.py", line 345, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/wheel.py", line 287, in clobber
    ensure_dir(dest)  # common for the 'include' path
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages/pip/utils/__init__.py", line 83, in ensure_dir
    os.makedirs(path)
  File "/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 30] Read-only file system: '/private/var/folders/15/jvtd26d96hd8gfmpfpzzsh100000gn/T/AppTranslocation/33C36B80-7AAD-4C3D-A538-BC7A935D0CF1/d/OpenSesame.app/Contents/Resources/lib/python2.7/site-packages'
Out[2]: 2

Many thanks to anyone who can help me sort this out, as I'm not usually a Mac user (usually a Linux user).

smm

I wound up resolving this by having the Mac user run OpenSesame as root.

sebastiaan

Good to hear you figured it out!