I updated my Mac recently, and i can not compile one of my old project now:
However, i got this error:
ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/compass
always make sure you updated your xcode to the latest version.
open your xcode, don't need to create any app, just open, if xcode asks you to agree or download anything, please agree.
sudo brew install ruby
sudo gem update --system
sudo gem install compass
if above command give you error, then try below:
sudo gem install -n /usr/local/bin sass
you will be ok if you see below error.