Macos Catalina error after update: unable to run colorls

Question

Updating to macOS Catalina gives error on opening terminal

ERROR:  Can\'t find Ruby library file or shared library colorls
usage: dirname path
/         


        

Answer 1

Here is how I solved it:

1. sudo xcode-select --install
2. Install rbenv with brew install rbenv
3. Add eval "$(rbenv init -)" to the end of ~/.zshrc or ~/.bash_profile
4. Install a ruby version rbenv install 2.6.0
5. Select a ruby version by rbenv rbenv global 2.6.0
6. Open a new terminal window.
7. Verify that the right gem folder is being used with gem env home (this should report something in your user folder, not system wide).

After this I installed colorls again using sudo gem install colorls

If getting error:

ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /usr/bin directory.

Try installing colorls using cmd:

sudo gem install colorls -n /usr/local/bin

After this you see colorls is installed successfully and new terminal works fine.