Homebrew – Fix Xfig Segmentation Fault

Maybe duplicate of https://stackoverflow.com/questions/28669587/python-segmentation-fault-11-when-running-import-cv-or-import-cv2. Did you install python through brew? If yes then there is probably crash between built-in version that ships with macOS and that installed through brew. Try using absolute path /usr/bin/python -c "import cv2" (built-in) and /usr/local/bin/python -c "import cv" (from brew). One should probably work.

According to the homebrew FAQ, to uninstall homebrew you use:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"

If you don’t want to completely uninstall home-brew but just want to remove all packages installed by homebrew, I think this will do what you need (I’m not currently in a position to remove all of my packages to check):

#Loop while there are still package installed
while [[ `brew list | wc -l` -ne 0 ]]; do
    #Interate over each installed package
    for EACH in `brew list`; do
        #Uninstall each package
        brew uninstall $EACH --force
    done
done

I’ve enclosed the whole thing in a loop double check that after the first run all of the packages have been uninstalled—I’m pretty sure they will be due to the --force option, but belt and braces...