In addition to new betas of iOS 12.4 and more, Apple today has also released the fourth developer beta of macOS Catalina. This update comes two weeks after Apple released the third developer beta of the update.

While Apple has released the fourth developer beta of macOS Catalina, the fourth developer betas of iOS 13 and watchOS 6 are nowhere to be found. They might still come later today, or Apple could be waiting a bit longer.

Of note, Apple is warning developers about one major incompatibility in the fourth beta of macOS Catalina:

  • Hands-on with 200+ iOS 13 changes and features [Video]
  • Hands-on with 50 new iPadOS 13 changes and features [Video]
  • Previewing CarPlay in iOS 13: Light mode, new and improved apps, more
  • watchOS 6 Guide
  • tvOS 13 Guide
  • Hands-on: macOS Catalina top features [Video]