When Did I Install Rosetta On My Mac?

I was wondering when I installed Rosetta 2 on my mac, here goes…

$ pkgutil --pkg-info com.apple.pkg.RosettaUpdateAuto
package-id: com.apple.pkg.RosettaUpdateAuto
version: 1.0.0.0.1.1711007790
volume: /
location: /
install-time: 1714615611

So the install time’s in seconds since the epoch, so let’s convert that to a human-readable date:

$ date  -r "$(pkgutil --pkg-info com.apple.pkg.RosettaUpdateAuto \
    | grep install-time \
    | awk '{print $NF}')"  \
    +%Y-%m-%d
2024-05-02

Tadaaaaa! Realistically this is when it was last updated, but it’s a start.

I found the package details on: https://apple.stackexchange.com/questions/427970/how-to-tell-if-m1-mac-has-rosetta-installed