How can I check if Rosetta 2 is installed?

[ProQuiz]

How can I check if Rosetta 2 is installed on my Apple silicon Mac? Is there a Terminal command for this? Also, if Rosetta 2 Updater is installed does that mean Rosetta 2 is installed?

 

[chrfr]

if Rosetta 2 Updater is installed does that mean Rosetta 2 is installed?

That's what that means.

 

[ProQuiz]

That's what that means.

But I haven't installed any app that requires Rosetta. I was just trying to install my printer drivers and when I was about to install them, I got a message asking if I want to install Rosetta. I canceled and didn't install. If I got that message, I am assuming it is not installed even though the Rosetta 2 Updater is installed?

 

[chabig]

The Rosetta 2 Updater is an Apple Silicon app that installs and updates Rosetta. It doesn't necessarily mean that you have Rosetta.

Open System Information. In the left column select Applications. Then sort the results by Kind. If you have any Intel software on your machine, Rosetta has been installed so it can run.

 

[chrfr]

The Rosetta 2 Updater is an Apple Silicon app that installs and updates Rosetta. It doesn't necessarily mean that you have Rosetta.

Open System Information. In the left column select Applications. Then sort the results by Kind. If you have any Intel software on your machine, Rosetta has been installed so it can run.

I guess I was incorrect about the updater, but on this MacBook that does not have Rosetta installed, there are a number of Intel apps listed in System Information, but they've never been launched so Rosetta isn't installed on this computer.
If Rosetta is installed, it'll be listed under the Installations part of System Information as "RosettaUpdateAuto", and for the OP, if the computer asked to install Rosetta to install the print drivers, Rosetta is not currently installed.

 

[Bigwaff]

Nerd out…

Explainer: Rosetta 2

Rosetta 2 is key feature for the transition to Apple silicon, and is also available to run Intel x86_64 binaries in virtual macOS and Linux (in Ventura).

eclecticlight.co

Installing Rosetta 2 on Apple Silicon Macs

With Apple now officially selling Apple Silicon Macs, there’s a design decision which Apple made with macOS Big Sur that may affect various Mac environments: At this time, macOS Big Sur does …

derflounder.wordpress.com

 

[HDFan]

How can I check if Rosetta 2 is installed on my Apple silicon Mac?

I got a message asking if I want to install Rosetta.

Why do you care? It can be installed, as above, when it is required.

 

[casperes1996]

Certain way to check if Rosetta 2 is installed.
1) Open Terminal
2) Run `arch -x86_64 zsh` (the ` are just to separate the command from other text)
3) If it says "Bad CPU Type" you do not have Rosetta. If instead if goes to the next line as if nothing happened, you do indeed have Rosetta installed. Hit ctrl+d twice to exit (once to exit the Rosetta zsh, once more to close the original terminal session)

 

[bogdanw]

The Rosetta 2 Updater app or softwareupdate --install-rosetta download and install RosettaUpdateAuto.pkg

If we look inside the pkg, we can see what files are being installed and where:
/Library/Apple/usr/lib/libRosettaAot.dylib
/Library/Apple/usr/libexec/oah/debugserver
/Library/Apple/usr/libexec/oah/libRosettaRuntime
/Library/Apple/usr/libexec/oah/RosettaLinux/rosetta
/Library/Apple/usr/libexec/oah/RosettaLinux/rosettad
/Library/Apple/usr/libexec/oah/runtime
/Library/Apple/usr/libexec/oah/translate_tool
/Library/Apple/usr/share/rosetta/rosetta