Beyond macOS 10.14, 32-bit apps may not work at all, similar to Apple’s transition from PowerPC to Intel from OS X 10.4 to OS X 10.6. Apple has warned both developers and users that High Sierra (the current version of macOS as of the date of this article) is the last version of the operating system that will run 32-bit apps “without compromise.” Starting with the next version of macOS likely to be released this fall, 32-bit apps may need to be emulated to work with Apple’s latest hardware and software platforms, something that would result in noticeable performance degradation. From an end user’s perspective, everything just works.īut that’s going to change soon. The Mac operating system itself has been 64-bit for years, but has maintained compatibility with 32-bit apps. 32-bit Apps: What to Do If an App 'is Not Optimized for Your Mac'įollowing the path it took with iOS, Apple is preparing to transition macOS to require 64-bit apps.
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