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For a certain definition of "undo", yes. The System volume tends to be mounted read-only and very little people go through the effort of mutating it. So in most

For a certain definition of "undo", yes. The System volume tends to be mounted read-only and very little people go through the effort of mutating it. So in most cases, you can invoke softwareupdate(1) to download an older OS installer then run the installer to replace your existing OS.

cassianoleal 3y ago
You can also download the installer for older versions [0] from the web. [0] https://osxdaily.com/where-download-macos-installers/ https://osxdaily.com/where-download-macos-installers/