I am getting an error message after upgrading to macOS Catalina.

zsh: /usr/local/bin/colorls: bad interpreter: /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby: no such file or directory

It seems Ruby has been updated since, when I run ruby -v, it outputs the following.

ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]

How can I make colorls use Ruby 2.6 instead of Ruby 2.3 that was present when the command was installed?

I tried reinstalling and then uninstalling it multiple times, but I am still getting the same error.

I did manage to temporarily make the error message disappear using the following line.

PATH="`ruby -e 'puts Gem.user_dir'`/bin:$PATH"

Every time I open a new terminal, the error message comes again. I will like to find a way to make it persistent.

4 Answers 4


After couple of different solutions I tried I managed to make it work with RVM.

Install rvm from terminal:

\curl -sSL https://get.rvm.io | bash -s stable

Once installation is complete, it will say something like:

To start using RVM you need to run `source /Users/{username}/.rvm/scripts/rvm`

So copy/paste that into terminal, and then install ruby version you want, I used:

rvm install 2.6.5

Now when you have your ruby in place you should be able to install gems for the version you've chosen, eg I installed bundler

gem install bundler

This will make rvm as default ruby manager, and will use 2.6.5 from terminal. Hope that helps.

  • Definitely way to go. It works Oct 10, 2019 at 15:22
  • Kinda worked, did tons of stuff but eventually fixed it somehow Nov 19, 2019 at 11:19

For me the version of the ruby installed with Catalina was newer. I only had to reinstall the missing gems so if you already have ruby installed, this might fix it:

gem install colorls


Here's what helped me:

brew install cocoapods --build-from-source


brew link --overwrite cocoapods

Thanks, christian Martin, but none of these options worked for me. My solution is - reinstalling color ls github pg —> https://github.com/athityakumar/colorls

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.