New Alert In MacOS 10.13.4 Signals The Upcoming End Of 32-bit App Support

What to do if you see an alert, and how to find out which of your apps will need updating.

- Roman Loyola

Apple’s transition from 32-bit to 64-bit technology on the Mac has been in the works for a while for the company and developers, but so far users haven’t really been affected. That started to change beginning in mid-April.

NEW 32-BIT ALERTS IN MACOS 10.13.4 HIGH SIERRA

If you’re using an old 32-bit app on a Mac,macOS will display an alert to let you know that it may not run optimally and that you should check with the developer to see if an update is available. The alert is similar to the ones that appeared when Apple transitioned iOS from 32-bit to 64-bit (go.macworld.com/32b6).

The alerts appear only when a 32-bit app launches, and will have a Learn More button that takes users to an Apple Knowledge Base article that explains the 32-to-64-bit transition (go.macworld.com/apkb).