Apple will begin notifying users about Rosetta 2 discontinuation in macOS 26.4, following the company's announcement at WWDC25 that the translation software would be phased out after macOS 27. The alerts will inform users which apps will become incompatible when Rosetta 2 support ends, giving them time to prepare for the transition.

Rosetta 2 has been essential for running Intel-based applications on Apple's Apple silicon Macs since the transition began in 2020. The software has allowed millions of users to continue using legacy apps while developers updated their programs for the new architecture. However, Apple has been clear that this transitional technology has a limited lifespan.

This notification system represents Apple's effort to ensure a smooth transition away from Intel compatibility. Users will need to either find Apple silicon versions of their essential apps or potentially upgrade to newer software versions. The move underscores Apple's commitment to its own silicon architecture and the eventual sunset of support for older Intel applications across its ecosystem.