From 10.13.4 beta release notes
“When users attempt to launch a 32-bit app in 10.13.4, it will still launch, but it will do so with a warning message notifying the user that the app will eventually not be compatible with the operating system unless it is updated.”


iMac, 3.7 GHz 6-Core Intel Core i5, BIAB MAC2024 (802), Audient iD4