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Creating bootable usb installer for os maverick from mac os

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If you’re getting an error like this saying 'This copy of the Install OS X El Capitan application can't be verified. To boot from the installer, reboot your Mac and hold down the alt/ option key, and it will let you

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You should see output like the following-it might take a while to finish. Sudo /Applications/Install \ macOS \ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install \ macOS \ Sierra.app -nointeraction

 

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