Macs render fonts bolder than they are, especially on dark background. This can be fixed by configuring the font smoothing:

body
  -webkit-font-smoothing: antialiased
  -moz-osx-font-smoothing: grayscale

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

• Prevents you from data breaches and liability risks
• Upgrade at your own pace
• Works with modern Rubies

Read more Show archive.org snapshot

You should do this on every project, all the time.