The beta versions of macOS 10.3.4 were reported to include warnings when you started a 32-bit app. From the release notes:
To prepare for a future release of macOS in which 32-bit software will no longer run without compromise, starting in macOS High Sierra 10.13.4 a user is notified on the launch of an app that depends on 32-bit software.
I've been using the released version of 10.3.4 for a few days, but I haven't seen any notices when I run 32-bit software. Was this feature removed? Or are there special conditions that need to happen before it appears?
Best Answer
Yes, after midnight, April 12, 2018 in the user's local time zone
From Ars Technica's "Apple has begun notifying macOS users of coming 32-bit app incompatibility".