How to Run Older Intel Mac Apps on Apple Silicon With Rosetta 2

Switching to an Apple Silicon MacBook rarely breaks your older software, because Rosetta 2 quietly translates Intel-built apps so they run on the M-series chip. You do not download it from a website or run an installer by hand. The first time you open an app that was only ever compiled for Intel, macOS asks once to install Rosetta, you click through, and from then on translation happens invisibly every time that app launches.

Quick Answer

Rosetta 2 is automatic. macOS prompts you to install it the first time you open an Intel-only app, you confirm, and translation then runs silently in the background with no further setup. It converts Intel (x86_64) code to run on Apple Silicon, and Apple has carried it forward through current macOS releases, so most older Mac apps keep working on M-series machines.

How Rosetta 2 Installs Itself

There is no separate download. When you launch an Intel app on an M1, M2, M3, or M4 Mac for the first time, a dialog appears offering to install Rosetta. Click Install, authenticate with your password or Touch ID, and macOS fetches the component in the background. It takes seconds on a decent connection.

Once installed, Rosetta stays on the system and handles every Intel app you open afterwards without prompting again. You will not see it running, there is no app icon, and there are no settings to manage. If you want to install it before you even open an Intel app, you can trigger it from Terminal with softwareupdate --install-rosetta, which is handy when setting up a machine for someone else.

What Rosetta 2 Actually Does Under the Hood

Apple Silicon uses the ARM architecture, while older Mac apps were compiled for Intel's x86_64. Those are different instruction sets, so the chip cannot run Intel code directly. Rosetta bridges that gap by translating the Intel instructions into ARM instructions the M-series chip understands.

It does this two ways. Most of the work happens ahead of time: when you first launch an Intel app, Rosetta translates its code and caches the result, so subsequent launches skip that step and start faster. For code that is generated while the app runs, Rosetta translates on the fly. The result is that a well-behaved Intel app feels close to native, even though it was never built for your chip.

Performance: What to Expect

Translated apps run a little slower than native ones, but Apple Silicon is fast enough that most users never notice. Everyday productivity software, older creative tools, and many games run smoothly under translation. Where you might feel the difference is in heavy, sustained workloads like large video exports or demanding compilation, where a native (Apple Silicon) version would pull ahead.

The fix, where it exists, is to run the native build. Many developers now ship Universal apps that contain both Intel and Apple Silicon code, and macOS automatically picks the native version, leaving Rosetta out of the loop entirely. You can check an app in Finder by selecting it, choosing Get Info, and reading the Kind field, which tells you whether it is Universal, Apple Silicon, or Intel.

What Rosetta 2 Cannot Do

Rosetta is broad but not total. It cannot translate kernel extensions, so older software that installs low-level system drivers may not work. It also does not handle virtualisation of x86 operating systems, which is why running an Intel version of Windows in a virtual machine on Apple Silicon is not straightforward. Apps that depend on specific Intel-only instruction sets the translator does not support can also misbehave.

For the vast majority of normal Mac software, none of this matters. If you are weighing up a move to Apple Silicon and want to see the current lineup, the MacBook range at Evetech lays out the M-series options so you can match a chip and memory size to the work you do.

Should You Worry About App Compatibility When Buying?

For most South African buyers, no. The software you use daily almost certainly has a native or Universal build by now, and anything that does not will fall back to Rosetta automatically. The practical advice is to list the few apps you truly depend on, confirm each one runs on Apple Silicon (most vendors state this clearly), and buy with confidence. If you want a sense of which models people are actually choosing, the laptop best-sellers page is a quick read on what is moving.

Frequently Asked Questions

Do I have to install Rosetta 2 manually?

No. macOS prompts you automatically the first time you open an Intel-only app, and you just confirm the install. You can pre-install it from Terminal with the softwareupdate command, but for most people the automatic prompt is all they will ever see.

Will Rosetta 2 slow down my Mac?

Only translated apps run slightly slower, and Apple Silicon is fast enough that the difference is usually unnoticeable in everyday use. Native and Universal apps run at full speed because they bypass Rosetta entirely.

Is Rosetta 2 still supported?

Yes. Apple has carried Rosetta 2 forward through current macOS releases so the large library of Intel-era Mac apps keeps working. Over time more software ships native, which reduces how often Rosetta is actually invoked.

How do I know if an app is running through Rosetta?

Select the app in Finder, press Get Info, and look at the Kind field. It will read Application (Intel), Application (Universal), or Apple Silicon. You can also check the Activity Monitor, which has a column showing each process architecture.

Can Rosetta 2 run Windows Intel apps?

Not directly. Rosetta translates Intel Mac apps, not Windows software, and it does not virtualise an Intel version of Windows. Running Windows on Apple Silicon relies on ARM builds of Windows rather than Rosetta.