Universal vs Apple Silicon: what actually ships

On macOS, an executable file can contain machine code for more than one CPU architecture. A binary containing both Apple Silicon (arm64) and Intel (x86_64) slices is a Universal binary. The operating system loads the native slice matching the host machine automatically.

By contrast, an Apple Silicon-only binary contains only arm64 instructions. It executes natively on Apple Silicon Macs, but will not load on Intel hardware.

Every component of StudioZIO Mastering Suite 2.1.1 is built as a Universal binary. Whether you load the AUv2, VST3, AAX, or Standalone application, the binary contains dual architecture slices: arm64 and x86_64.

This means Mastering Suite runs without translation on Apple Silicon and provides native performance on legacy Intel systems on macOS 11 or higher.

StudioZIO Tempo Delay 4.0.1 is compiled specifically for Apple Silicon (arm64). All four outputs (AU, VST3, AAX, and Standalone) contain exclusively arm64 code.

There is no Intel slice in the executable, and it will not run on Intel Macs. Stating this limit plainly ensures users on Intel systems do not download an installer that cannot run in their environment.

A Mastering Suite 2.1.1 installer published in September 2026 was named StudioZIO-Mastering-Suite-v2.1.1-macOS-arm64.pkg. That name arose during build orchestration, but binary analysis showed every payload inside to be a dual-slice Universal binary.

Because published release artifacts are immutable, we did not rename or repackage a verified, notarized installer merely to alter a cosmetic label. The current installer is named StudioZIO-Mastering-Suite-2.1.1.pkg, the name the release pipeline emits. Either way, the architecture truth comes from the binaries within the payload, verified directly during release inspection.