Core Points - Meta is discontinuing its desktop Messenger apps for Windows and Mac, effective December 15, with users needing to switch to Facebook for chat functionality [1] - Users will receive an in-app notification during the shutdown process, with a 60-day window to continue using Messenger before it is permanently shut down [1] - The mobile Messenger app will remain available for users [1] Data Summary - Users are advised to activate secure storage to save their chat history before the app is permanently removed, as it will be lost otherwise [2] - The Messenger desktop app is no longer available on the Apple App Store, and after December 15, users attempting to access Messenger on desktop will be redirected to Facebook.com or Messenger.com for those without a Facebook account [2]