Rosetta 2

Rosetta 2 is Apple’s translation technology that allows Apple Silicon Macs to run programs built for x86_64. In Wine-based game runtime environments, x86_64 Windows programs, Wine components, and related runtimes may be used together, so Rosetta 2 can play an important role.

Main Components

Rosetta 2 is not a technology made of only one feature. It can be understood as a combination of multiple translation methods and CPU behavior model adjustments.

JIT (Just In Time): Converts x86_64 code needed during program execution into code that can run on Apple Silicon immediately.
AOT (Ahead Of Time): Converts some code before execution to reduce overhead during repeated runs.
TSO (Total Store Ordering): Relates to adjusting differences between the memory ordering model assumed by x86-family CPUs and the behavior of Apple Silicon.

Role in This Project

In the Bob-Ddong-Iri-Hoyo launcher’s execution path, Wine, Windows games, Steam, and graphics translation layers work together. If some of these components assume an x86_64 environment, Apple Silicon Macs need help from Rosetta 2.

Rosetta 2 is not a component users usually configure in detail, but if it is not installed, certain executables may fail to start or internal launcher tasks may fail. Therefore, when using the launcher on an Apple Silicon Mac, it is a good idea to check the Rosetta 2 installation step in the installation guide first.