System Updates · October 19, 2026 · ComputerKing Team

"ComputerKing Computer ER" Radio Show: Upgrading to macOS 27? Check Whether Your Old Intel Apps Will Still Open — Rosetta Is Being Retired

After upgrading to macOS 27, Rosetta is not automatically restored — but reinstalling it still works. The real deadline is macOS 28, when Rosetta will only support certain older games. Check which of your apps are still Intel-only before you upgrade.

Key Takeaways

• Rosetta is the translation layer that lets Intel-only apps run on Apple silicon Macs. After you upgrade to macOS 27, Rosetta is not automatically restored even if it was installed before — but macOS will offer to reinstall it when you open an Intel app.
• Reinstalling Rosetta on macOS 27 still works, so your old apps are not dead on arrival. The real deadline is macOS 28: from then on, Rosetta will only support certain older, unmaintained games that rely on Intel frameworks, and other Intel apps and some of their components will stop working.
• Check before you upgrade: System Settings → General → About → Details next to Intel-based Apps lists the apps that still need Rosetta. In Finder, select an app → File → Get Info → Kind: "Application (Intel)" needs Rosetta; "Application (Universal)" runs natively.
• The silent failures are the dangerous ones: menu bar utilities, login items and background helpers may simply stop appearing, with no prompt at all. Plug-ins, drivers and audio units loaded by native apps may not even show up as apps.
• Before any major macOS upgrade: back up with Time Machine, make your Intel-app list, and ask each vendor for a native-version timeline. Do not upgrade in the middle of a deadline week.

Show Transcript

Opening

May: Hello everyone, welcome to *ComputerKing Computer ER*! I'm your host, May! Today's episode is for every Mac owner who has ever clicked "Upgrade" and then regretted it — because macOS 27 has changed something quietly, and if you use older software, you need to know about it before you upgrade. With us as always is our Technician. Technician, hello!

Technician: Hello May, hello everyone. The thing that changed is called Rosetta. A lot of people have never heard of it, and that is exactly why it catches them out.

May: Rosetta — that sounds like a language thing. What is it actually doing on my Mac?

Part 1: What Rosetta is

Technician: Think of it as a translator. Since late 2020, Macs have run on Apple silicon chips. But plenty of software was written for the older Intel chips. Rosetta is the layer that translates those Intel-only apps on the fly so they can still run on an Apple silicon Mac. If you have ever opened an old app and it just worked, Rosetta was probably doing the work in the background.

May: So if I have been using my Mac happily for years, I might have Rosetta and not even know it?

Technician: Exactly. And that is why the macOS 27 change matters. It is not that Apple deleted your apps. It is that the translator can go missing during the upgrade, and you only discover it when something does not open.

Part 2: What actually happens when you upgrade to macOS 27

May: OK, so I click upgrade to macOS 27. What happens to Rosetta?

Technician: According to Apple's macOS 27 release notes, if Rosetta was previously installed, it is not automatically restored after the upgrade. So after the upgrade, your Mac is sitting there without Rosetta until someone puts it back.

May: That sounds bad. Does that mean all my old apps are dead?

Technician: No — and this is the important part. Rosetta still works on macOS 27 once it is back. When you open an ordinary Intel app after the upgrade, macOS asks you to reinstall Rosetta. You approve it, it installs, and the app opens. Apple's support article gives the Terminal command too: `softwareupdate --install-rosetta`. For an unattended script, adding `--agree-to-license` skips the licence prompt.

May: So on macOS 27, it is one extra step, not a disaster.

Technician: For ordinary apps, yes. But there is a catch, and it is the reason we are doing this episode.

Part 3: The silent failures nobody warns you about

May: What is the catch?

Technician: The reinstall prompt only appears when you open an app on purpose. Software that nobody opens — menu bar utilities, login items, background helpers — can fail silently, with no prompt at all. In testing over the summer, that is exactly what happened with menu bar utilities from vendors without native builds: they just never appeared.

May: So the Mac looks fine, but a little tool I rely on has quietly vanished.

Technician: Yes. And it gets worse: plug-ins, drivers and audio units that are loaded by native apps may not show up as apps at all. You would not find them by looking through your Applications folder. The symptom looks like "the Mac is broken" or "my workflow stopped working", and it is very hard to connect that back to Rosetta unless you know to look.

May: And the prompt itself — does everyone even see it?

Technician: The prompt asks for a macOS username and password. On a managed Mac where staff are not administrators, that may be a request the user cannot complete. That is why, for company fleets, pushing the install by script is often the practical answer — but it removes the one signal that tells the user an app is living on borrowed time.

Part 4: How to check which of your apps still need Rosetta

May: Right, so before I upgrade, how do I find out which apps of mine still need Rosetta?

Technician: Apple gives you two ways on a single Mac. In macOS 27, open System Settings, choose General, then About, and click Details next to Intel-based Apps — you get a list. Or in Finder, select any app, choose File then Get Info, and look at Kind: "Application (Intel)" means it needs Rosetta; "Application (Universal)" means it runs natively.

May: And if I look after I have already upgraded?

Technician: Same place. But do it before you upgrade, because the list is your to-do list. Look past the Applications folder: check your menu bar utilities, your login items, anything that starts in the background. Those are the ones that fail silently.

May: What about warnings? Has Apple been telling us this was coming?

Technician: Yes, to be fair to Apple, there has been a sequence of warnings. Since macOS Tahoe 26.4, opening an app that runs under Rosetta brings up a notice that it will stop working when Rosetta support ends. Then macOS 27 gives you the Intel-based Apps list, then the reinstall prompt. Every one of those is designed for a person opening an app on purpose — which brings us back to the silent software.

Part 5: The real deadline is macOS 28

May: You said macOS 27 is not the disaster. So when is the real deadline?

Technician: macOS 28. Apple's support article says that from macOS 28, Rosetta will work only for certain older, unmaintained games that rely on Intel-based frameworks, and Intel apps and some of their components will stop working. Reinstalling Rosetta on macOS 27 is a short-term workaround. It buys time until macOS 28 — nothing more.

May: Will the games exception save anything I use for work?

Technician: No. Apple has not published which titles it covers, only that they are older and unmaintained. Do not plan around the games exception for business software.

May: So what should a listener actually do this week?

Technician: Four things. One: back up with Time Machine before any major upgrade — every upgrade, no exceptions. Two: make your Intel-app list using the About page or Get Info, including menu bar tools and login items. Three: for each Intel app you actually need, ask the vendor for a native-version date, in writing, and set it against your own testing window rather than Apple's release day. Apple silicon Macs have shipped since late 2020, so a native build still on the roadmap is a choice about priorities. Four: do not upgrade in the middle of a deadline week, and if you can, let one test Mac upgrade first so whatever breaks, breaks in front of IT, not in front of everyone.

Closing

May: So the summary is: macOS 27 does not kill your old apps, but it does remove the translator, and macOS 28 is when the translator really goes away. Check your list now, while there is still time.

Technician: Exactly. The inventory you make this month is the list to start from. And if you are unsure whether an app is Intel or Universal, or a menu bar tool has vanished after an upgrade, bring the Mac in — we can check it and get Rosetta back in place.

May: That is all for this episode of *ComputerKing Computer ER*! If this saved you from a nasty surprise, share it with a Mac-using friend. See you next time!

How We Can Help

ComputerKing offers:

• 🔍 Pre-upgrade check: Intel-app inventory, menu bar tools and login items included, before you upgrade
• 🔄 Rosetta reinstall: get your Intel apps working again after a macOS 27 upgrade
• 💾 Backup setup: Time Machine plus an external drive, so no upgrade ever risks your files
• 🏢 Company Mac fleets: upgrade planning, vendor follow-ups and staged rollouts

Sources

• Apple macOS 27 release notes and Apple support article on Intel-based apps, as reported by APPDOOK (17 October 2026): https://appdook.com/news/prepare-mac-fleet-rosetta-removal-macos-27
• 9to5Mac Apple @ Work column (Bradley Chambers) on fleet preparation, as reported in the same article

This episode is a transcript of the show. Facts are cited from the sources above; macOS 28 timing follows Apple's usual autumn schedule and is a planning reference, not a confirmed date.