Apple Silicon (M1/M2/M3) Native vs. Rosetta on macOS Tahoe
macOS Tahoe introduced a significant architectural shift with the transition to Apple Silicon processors (M1, M2, M3). While new applications are built to run natively on these chips, many older applications were designed for Intel-based Macs. Rosetta 2 is a translation layer that allows these older apps to run on Apple Silicon.
Understanding the Difference
- Native: Applications compiled specifically for Apple Silicon. These offer the best performance and energy efficiency.
- Rosetta: A dynamic binary translator that allows Intel-based applications to run on Apple Silicon. While it works seamlessly, it introduces some performance overhead.
How to Tell If an App Is Running Natively or via Rosetta
- Open Activity Monitor (Applications/Utilities).
- Select the CPU tab.
- Look for the Kind column.
- Apple: The application is running natively on Apple Silicon.
- Intel: The application is running via Rosetta 2.
Running Apps with Rosetta
If an application is not running natively, macOS will prompt you to install Rosetta 2 the first time you try to run it.
Manually Installing Rosetta
If you are not prompted automatically, you can install Rosetta 2 from the terminal:
/usr/sbin/softwareupdate --install-rosetta --agree-to-licenseForcing an App to Open with Rosetta
Sometimes you might want to force an application to run with Rosetta, even if a native version is available (e.g., for compatibility testing).
- Find the application in Finder.
- Right-click the application icon and select Get Info.
- In the Info window, check the box labeled "Open using Rosetta".
Performance Considerations
- Native Apps: Always prefer native apps for the best experience.
- Rosetta Overhead: Apps running under Rosetta will generally be slower and consume more battery power than native apps.
- Edge Cases: Some apps may have compatibility issues or not function correctly under Rosetta.
Related Guides
- Troubleshooting Performance with Activity Monitor on macOS Tahoe
- Downloading and Installing Apps on macOS Tahoe