macOS 27 upgrades remove Rosetta, so audit Intel-only tools now

Upgrading an Apple silicon Mac to macOS 27 Golden Gate removes something many work Macs still quietly depend on. Apple's macOS 27 release notes state that if Rosetta was previously installed, it is not automatically restored after upgrading to macOS 27.0. Intel-only apps still run on macOS 27, but only after Rosetta is installed again. A 9to5Mac Apple @ Work column on October 17 turned this into a fleet warning, and several software vendors have published reinstall notes for their customers since late September.

What Apple has documented

Apple released macOS 27 on September 14, 2026. Its release notes and its support article on Intel-based apps spell out what changes and what comes next:

• Rosetta is not restored after the upgrade to macOS 27.0 if it was installed before
• Apps set to "Open using Rosetta" now launch natively, so retest old workarounds
• Installer packages with no declared host architecture now default to arm64
• Settings lists Intel-based apps that will be incompatible with macOS 28, under General, About, Intel-based Apps
• Intel-based plugins and loaders may not appear in that list or trigger warnings
• Starting with macOS 28, Rosetta will be available only for certain older, unmaintained games

What admins and Mac users should do

When someone opens an Intel app, macOS offers to install Rosetta, and the Terminal command "softwareupdate --install-rosetta" does the same. For managed fleets, 9to5Mac's Bradley Chambers pushes "softwareupdate --install-rosetta --agree-to-license" through his MDM to every Mac that lands on macOS 27. He reports that some Intel-only menu bar utilities failed silently in his testing, with no prompt at all, which is why an inventory matters more than the prompt.

Start with the Intel-based Apps list in Settings, then check the plugin folders Apple names, such as ~/Library/Audio/Plug-Ins, ~/Library/Printers, and ~/Library/ColorPickers. Audio plugins, printer drivers, VPN and web filtering agents, and old installers are the usual suspects.

This does not mean Intel apps stop working on macOS 27. Rosetta remains supported through macOS 27; the cutoff Apple has announced is macOS 28, the next major release.

Our take: reinstalling Rosetta by script is a sensible stopgap, not a plan. Use the time before macOS 28 to replace tools that still need Intel translation, and treat a vendor's "on the roadmap" answer as a risk to budget for.

Caveat: Apple has not said which legacy games will keep Rosetta in macOS 28, or when that release will ship.

Primary Sources

• Apple Developer: macOS 27 Golden Gate Release Notes
• Apple Support: Using Intel-based apps on a Mac with Apple silicon
• Apple Support: Apple security releases
• Rational Acoustics: Re-installing Rosetta after updating to macOS 27 Golden Gate
• 9to5Mac: Apple @ Work: How I am preparing my fleet for Rosetta's removal in macOS 27