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Apple yesterday released macOS Sierra for public. The update weighs ~5 GB. I have two Macs with me: one is my personal, the other my office has given. Instead of downloading the installer twice (10 GB), It would be great to download the copy and once use it to upgrade multiple devices (iMacs/Mac minis).

I have tried to find the dmg file but I haven't been able to find it, instead I was redirected to the App Store. Any help would be appreciated.

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  • Download on the first machine.
  • When complete, the Installer will auto-launch.
  • Quit it.

The Installer is in /Applications/ and has the name Install macOS Sierra. [BTW it's not a .dmg, but an .app file]

Copy it to a safe place; after install it will be auto-deleted from Applications.

The copy can then be used on any other machine. Drop into the Applications folder on that machine & launch.

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    Or, instead of a 'safe place', just straight into the /Applications folder of whatever machines you're upgrading. – Williham Totland Sep 21 '16 at 9:15
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    Unless, like me, you keep them. You need one copy that's not in Applications, as they get deleted after update. – Tetsujin Sep 21 '16 at 9:20
  • It's an installer DMG too. Just right-click the "Applications/Install MacOS Sierra" app, and select "Open Package Contents". Then go into the SharedSupport and you'll see the ~4.9 GB DMG file. COPY it to another location (drag-n-drop will not work, it just creates a shortcut). – eduncan911 Apr 11 '17 at 16:43
  • It contains a .dmg, sure - but that's not necessarily the best practise, to remove it from the app, as it then won't work as a simple updater. – Tetsujin Apr 11 '17 at 17:03

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