Updating Homebrew, R and Python pip packages + Ruby Gems + macOS

Update Monday 2nd of April 2018: I decided to add to this post how to update the RubyGems since they are a key feature of Jekyll. Update Thursday, 19th of April 2018 11.00 UTC+3: I added info about how to update on the CLI the App Store Apps and macOS software updates. In the post…Read more Updating Homebrew, R and Python pip packages + Ruby Gems + macOS