That implies that the issue mostly occurs either because the creators of the apps are yet to release app updates that recalibrate the app to make it compatible with the new OS requirements, or that the user is yet to install the released app updates. These issues have been heavily-linked to app incompatibility issues on the new MacOS update.
Numbers File Can’t Be Open on macOS 10.14.Can’t Open Keynote Files on macOS 10.14.macOS 10.14 Update Not Showing on App Store.Alternatives to Adobe Acrobat for macOS 10.14.Mac Won’t Wake from Sleep on mac OS 10.14.Black Screen after Upgrade to macOS 10.14.
Time Machine Stuck on Preparing Backup in macOS 10.14.Apps Freeze or Quit Unexpectedly on macOS 10.14.Merge and Remove Duplicate Contacts on macOS 10.14.Remove and Rearrange Menu Bar Icons on macOS 10.14.Edit Photos with Preview in macOS 10.14.Method to Back Up Data on Mac before Updating into 10.14.