64-bit Requirement for Mac Apps

Apple

As a reminder, 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. If you distribute your apps outside the Mac App Store, we highly recommend distributing 64-bit binaries to make sure your users can continue to run …

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64-bit Transition on macOS

Apple

With the recent release of macOS High Sierra 10.13.4, the first time users launch an app that does not support 64-bit they will see an alert that the app is not optimized for their Mac. As a reminder, new apps submitted to the Mac App Store must support 64-bit, and starting …

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