This is a guideline for installing fastlane on your mac. 1- Install Xcode command line tools: xcode-select — install 2- Install Homebrew: https://brew.sh/ 3- Install ruby. Ruby is already installed on Mac but I highly recommend to install a new version with brew. Check below links if you encounter any problem: brew install ruby https://stackoverflow.com/questions/39381360/how-do-i-install-ruby-gems-on-mac…