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Download a full macOS installer from Terminal — via SS64

Commandlow riskmacOS 14 Sonoma and later

softwareupdate can list and download complete macOS installers, including older versions Apple still serves. Useful for making a bootable USB installer or installing on another Mac without hunting through the App Store. This entry only downloads; it doesn't install anything.

Takes effect right away

The easy way

  1. Run the command to see which installer versions are available.
  2. Download one with softwareupdate --fetch-full-installer --full-installer-version 15.7 (use a version number from the list).
  3. softwareupdate --list shows which updates are pending for this Mac, without installing anything.

Command

Run in Terminal (Applications › Utilities).

softwareupdate --list-full-installers
Full installers are several gigabytes, so check your free space first. Delete the installer app when you're done with it.

Sources

Source reviewed
2026-11-02
Link checked
2026-11-02
Tested hands-on
Not by Oddbyte.Me

Oddbyte.Me hasn't tried this on every macOS version, so keep the undo handy.

softwareupdatemacos installerbootable usbdownload macosterminal

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