Golden Gate is the last Rosetta Stone supported macOS?

Technically Rosetta 2, not ''Rosetta Stone" but yes.

A warning is triggered when you launch an Intel-only app, and you will see it every time you launch such an app. Launching a recently used Intel app again won't trigger it, but if enough time has passed then you'll see the warning again for that app. For example, I last used the SynologyAssistant app to check on my NAS over a month ago, and launching it generated the banner message.

To avoid this issue you need to run only Universal or Apple Silicon apps. For apps that are Intel only, contact the developers and push them to release updated versions of their apps (but keep in mind that they have over a year before their apps stop working on macOS). 

To see which of your apps are Intel and thus need to be updated or they won't run on macOS 28 (Fall 2027), go to System Settings > General > About > System Report (button at the bottom). Select Applications in the Software section of the sidebar, then click on the Kind column header to sort them. 

Some apps aren't readily identifiable by the name, but when you select that app you will get more info. For example, 'commandFilter' is a component of the Epson printer drivers. Apps like that can be safely deleted. 

Here's what Apple has to say about updating your apps:

Learn how to update Intel-based apps for Apple silicon - Apple Support

kaz-k wrote:

Golden Gate is the last Rosetta Stone supported macOS. if so, we have to use Golden Gate till Intel based Applications are updated to be Apple Silicon base even if macOS28 or later are released.

If the apps haven’t been updated in the last ~seven years, they’re probably (over?)due for replacement anyway.

But yes, you’ll need to run the apps in a guest of a virtual machine, or run the apps on an older macOS install, and (eventually) run the apps on an older Mac with older macOS.

Laurie wrote:

I have one program that "Has a native version but is forced to run under Rosetta due to an environmental override." I'll have to investigate that.

I'm still running Sequoia, but my guess is that we're talking about a Universal 2 application whose Get Info dialog has the "[X] Open using Rosetta" box checked.

Rosetta 2 cannot run mixed-mode processes – processes containing some application-level Apple Silicon code, and some application-level Intel machine code. So, for instance, people who had a Universal copy of Photoshop but who owned old Intel-only Photoshop plug-ins might check Photoshop's "[X] Open using Rosetta" and force macOS to run the Intel Photoshop code under Rosetta 2 translation so they could still use the Intel plug-ins.

It is probably a good bet that if the app developers have not updated their apps to Apple Silicon either as native or bundled in a Universal form by now, they likely won't or wait to see if they get enough complaints after macOS 28 is released to decide to update.

With that said, if the app vendor does have a new version available, bite the bullet and pay for the up date or otherwise find alternatives to the app that are Apple Silicon compatible.

It's the last one which will support most Intel applications. Some games will run in future revisions.

(264932)

It’s also quite possible that app developers have indeed updated their apps but users are unwilling to pay for those updates. They may have standalone licenses and are unwilling to move to subscription models. Those users will be affected the most when their Intel only apps stop working in macOS 28. They either find alternatives or cough up the money to update.

Sorry, I just realized you said the same thing. Apologies.

I found a quicker way to locate Rosetta apps.

Hold down Option Key, Click on Apple menu icon.

(About this Mac will change to System Information) Click on System Information

In the left column, under Software click on Rosetta Software.

The list of programs will appear in the main window.

It shows if there is a native version, the number of times launched and the last used date.

As you click on each one, more info appears below.

I have one program that "Has a native version but is forced to run under Rosetta due to an environmental override." I'll have to investigate that.

The other two do not have native versions, they are essentially abandoned and I am unable to locate suitable replacements.

Laurie wrote:

I found a quicker way to locate Rosetta apps.

Hold down Option Key, Click on Apple menu icon.

(About this Mac will change to System Information) Click on System Information

Thanks, that's a faster way to get to System Information.

In the left column, under Software click on Rosetta Software.

The list of programs will appear in the main window.

It shows if there is a native version, the number of times launched and the last used date.

As you click on each one, more info appears below.

I have one program that "Has a native version but is forced to run under Rosetta due to an environmental override." I'll have to investigate that.

The other two do not have native versions, they are essentially abandoned and I am unable to locate suitable replacements.

Note that, at least for me, the list of Intel applications in Applications is much longer than the list under Rosetta Software.

Rosetta Software:

Applications sorted by Kind (just the first part of Intel):

That's okay, sometimes it takes repetition to get the point across.

For some Intel based applications you may be waiting forever. It’s not Apple’s job to update those apps. It’s the developer of those apps that will need to produce Universal or Apple Silicon versions. Most of the major developers have long since updated their software to support both Intel and Apple Silicon. You the user, though, may have to pay for those updates. The smaller developers who actually care about their customers will be ready. But be ready for some Intel based apps to be abandoned by their developer. In that case you will need to find alternative apps.