After previously testing in beta, Apple is pushing a new 32-bit app warning live for users on macOS 10.13.4 starting at midnight local time. The alert will appear once per app when a user launches 32-bit software for the first when running the current macOS version.
The dialogue box can be dismissed with the ‘OK’ button or users can click ‘Learn More…’ to access a newly published explainer document on 32-bit app compatibility with macOS High Sierra.
more…
