Troubleshooting Unable to Install Ruby via rbenv Fixing Errors with cctools

If you are encountering issues while trying to install Ruby via rbenv and see errors related to “cctools,” this article will guide you through the troubleshooting process to fix the problem. The error message you might encounter is:

/usr/local/Cellar/cctools/855/bin/ranlib: object: apps/libapps.a(app_rand.o) malformed object (unknown load command 1)
ar: internal ranlib command failed
make[1]: *** [apps/libapps.a] Error 1
make: *** [all] Error 2

The “cctools” package could potentially conflict with the Ruby installation process, causing this error. To resolve the issue, we will walk through the steps to uninstall the “cctools” package and proceed with installing Ruby via rbenv.

Step 1: Uninstall cctools using Homebrew

First, we will uninstall the “cctools” package using Homebrew. Open your terminal and follow these steps:

  1. Launch the terminal application on your system.

  2. Enter the following command to uninstall cctools:

brew uninstall cctools
  1. Homebrew will remove the cctools package from your system.

Step 2: Install Ruby via rbenv

Now that the conflicting “cctools” package has been removed, you can proceed with installing Ruby via rbenv:

  1. Open your terminal if it’s not already open.

  2. Install rbenv if you haven’t already. You can use Homebrew for this as well:

brew install rbenv
  1. Once rbenv is installed, you’ll need to initialize it and add it to your shell configuration (e.g., .bashrc, .bash_profile, .zshrc). Run the following command:
rbenv init

Follow the instructions from the output to add the necessary configuration to your shell profile.

  1. Close and reopen your terminal to ensure the changes to your shell configuration take effect.

  2. Now, you can install the desired version of Ruby using rbenv. For example, to install Ruby 3.0.0, use:

rbenv install 3.0.0
  1. Once the installation is complete, set the global Ruby version:
rbenv global 3.0.0
  1. Verify that Ruby is installed correctly:
ruby -v


You should now have Ruby installed successfully on your system using rbenv, and the error related to “cctools” should be resolved. rbenv allows you to manage multiple Ruby versions on your machine easily, making it a convenient tool for developers working on different projects with varying Ruby requirements.