32-bit app compatibility with macOS High Sierra 10.13.4

Apple MacBook

The message is meant to warn users that Apple will soon end support for the legacy technology.

To see if your Mac's processor is 32-bit or 64-bit, go to the Apple menu and choose About This Mac.

Users of 32-bit applications on the MacOS platform could be left high and dry after Apple warned that support would be disabled in a forthcoming update. The support page broadly explains Apple's plans to "eventually" require all Mac software to be 64-bit.

MacOS High Sierra, the latest version of Apple's PC operating system, will be the last version to run 32-bit apps "without compromise", said Apple.

Only a day or two ago, similar notifications were seen by watchOS users, and it seems Apple is on a roll calling developers to improve compatibility of apps. "This is done via a one-time alert that appears when you launch a 32-bit app", Apple continued.

The 32- to 64-bit switch is something that's already happened with iOS, and macOS users can hardly say there has been no warning. If you don't update, the app will not run in a future version of macOS.

Apple has made clear for years now that its future fits squarely in the 64-bit realm.

With the new alert dialogue in macOS 10.13.4 going live, Apple is now informing customers about the upcoming requirement for 64-bit apps sometime in the future as well. Then scroll down to Software and select Applications. However, it is believed that the 32-bit apps won't work as well as they use to before. So, until Apple shares more details, possibly at Apple's Worldwide Developers Conference (WWDC) in June, it can be assumed that the 32-bit apps will work until then.

"The 64-bit transition for macOS and macOS apps is still underway, so final transition dates have not yet been established". Presently, the App Store does not accept submissions of 32-bit apps for macOS. The bar on 32-bit iOS apps was one of the key reasons the number of iOS apps in the App Store fell a year ago.

Apple started that process in 2013 with its first 64-bit mobile processor, the A7. For the next four years after the A7 chip, the company encouraged developers to move to 64-bit. In January, Apple mandated that all new apps submitted for review should be 64-bit compatible. Though the company hasn't been equally aggressive with the Mac users yet, given the warnings have already started it, won't be long before 32-bit takes its last breath on the Mac's as well. Further, a user also gets the option to delete it or keep it, even though the app can't be used, notes CNET.

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