Check your apps on macOS High Sierra for 64-bit status

Posted by Paul Korm
Mar 25, 2018 at 09:18 AM

In June 2017 Apple wrote

>At WWDC 2017, we announced new apps submitted to the Mac App Store must support 64-bit starting January 2018, and Mac app updates and existing apps must support 64-bit starting June 2018.

Open System Information (the Apple icon in the menu bar), and look in Software > Applications for the 64-bit column entry for your software. Check with the developer. When the June-ish update of macOS comes along it will natter you about 32-bit applications, and at a future time macOS will not open the application at all.