As a reminder, new submitted to the Mac App Store must support 64-bit starting January 2018, and Mac app updates and existing must support 64-bit starting June 2018. If you distribute your outside the Mac App Store, we highly recommend distributing 64-bit binaries to make sure your users can continue to run your on future versions of macOS. The last macOS release to support 32-bit without compromise is macOS High Sierra.

Learn more about distributing Mac apps.

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