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Apple Signals Transition Away from 32-Bit App Support on the Mac

Apple hasn’t announced a date by which it will end 32-bit app support on macOS, but the beta release of macOS 10.13.4 includes notifications signaling to users that the transition to 64-bit apps has begun. Today, Apple told Jim Dalrymple of The Loop that it will begin alerting customers if they are using 32-bit apps. Dalrymple says:

At this point, the alert is more of a gentle reminder to users that their apps are out of date. You will receive an alert once per 32-bit app, so it won’t be an annoyance, but certainly something you should pay attention too.

Apple first signaled that support for 32-bit apps would be ending at WWDC last summer.

As Steve Troughton-Smith pointed out on Twitter today, the signs point to a swift deprecation of 32-bit apps:

Among the evidence he cites is a switch included in the Xcode 9.3 beta that lets developers turn off 32-bit support in macOS 10.13.4 when testing their apps, speculating that:

If Troughton-Smith is correct that macOS 10.14 may have no 32-bit app support other than via a virtual machine, the transition would be notable for its speed. On iOS, Apple spent three years suggesting in a series of escalating steps that developers transition to 64-bit apps.

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