macOS 26.4 launches final phase for Rosetta 2

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With macOS 26.4, a new phase in the transition from Intel to Apple Silicon begins. The current beta version actively informs users for the first time when an app requires Rosetta 2 and when this support will be discontinued. With this, Apple is making the next step in its long-term move away from Intel technology transparent. macOS 26.4 is not the end of Rosetta 2, but rather the visible start of the transition phase.

At WWDC20, Apple announced the transition of the Mac platform from Intel processors to Apple Silicon. At the same time, Rosetta 2 was introduced. This is a translation layer that allows Macs with Apple Silicon to run apps originally developed for Intel-based Macs.

Rosetta 2 was intended from the outset as a temporary solution. Similar to previous architecture transitions, the technology was designed to give developers time to adapt their applications to the new platform.

At WWDC25, Apple finally specified how long Rosetta 2 will be supported. Full support will continue until macOS 27. Starting with macOS 28, Rosetta 2 will be largely discontinued. Apple announced that some functionality will be retained to support older, unsupported game titles that rely on Intel-based frameworks.

The new feature in macOS 26.4

Starting with macOS 26.4 Beta 1, a notification will appear when launching an app that requires Rosetta 2. This information clearly indicates that support for Rosetta 2 will be discontinued in future versions of macOS. This feature serves several purposes:

Users should be able to identify early on which applications are still based on Intel code.
This allows sufficient time to search for native Apple Silicon versions of the respective apps.
Developers are indirectly reminded to adapt their applications.

macOS 26.4 itself does not change the functionality of these apps. The warning is purely for informational purposes.

The timeline until macOS 28

Apple has communicated a clear roadmap:

macOS 27 will be the last version to fully support Rosetta 2.
Starting with macOS 28, Rosetta 2 will be largely removed.
A limited portion of the functionality will remain to keep older, no longer maintained games with Intel-based frameworks running.

macOS 28 is expected to be released in the fall of 2027. This leaves a multi-year transition period during which adjustments can be made.

The notification window introduced in macOS 26.4 should be understood as early preparation for this point in time.

macOS 26 is the last version for Intel Macs

Another important point concerns hardware support. macOS 26 will be the last major version to run on Intel-based Mac models.

After the end of major version support, Apple plans to provide Intel Macs with security updates for another three years. However, new features and major system updates will no longer be released.

This marks the gradual end of the Intel era on the Mac, both in terms of software and hardware.

Importance for developers and existing software

For developers, the introduction of warning messages in macOS 26.4 is a clear call to action. Applications that are still only available as Intel versions will have limited functionality or will no longer function at all starting with macOS 28.

This early notification is intended to prevent applications from suddenly failing to launch. At the same time, Apple is underscoring its strategic focus on native Apple Silicon software.

macOS 26.4 marks the beginning of the final phase for Rosetta 2

macOS 26.4 marks an organizational turning point in the transition to Apple Silicon. Rosetta 2 will remain available for the time being, but its long-term discontinuation is clearly scheduled. The new notification window provides early information about affected apps and creates transparency regarding upcoming changes.

Full support for Rosetta 2 will continue until macOS 27. Starting with macOS 28, Rosetta 2 will be largely removed, with a limited exception for older games. At the same time, macOS 26 will be the last major version for Intel-based Macs, followed by three years of security updates.

macOS 26.4 is therefore not a radical change, but a clear indication that the transition phase is entering its final stage. The best products for you: Our Amazon storefront offers a wide selection of accessories, including those for HomeKit. (Image: Shutterstock / Dontree_M)