This copy of the Install OS X El Capitan application can’t be verified. It may have been corrupted or tampered with during downloading

From the top menu bar, open Applications → Terminal Enter: date 0101010116 Enter: installer -pkg /Volumes/Mac\ OS\ X\ Install\ DVD/Packages/OSInstall.mpkg -target /Volumes/”XXX” where XXX is the name of the disk you’re installing to. Press return and wait …

This copy of the Install OS X El Capitan application can’t be verified. It may have been corrupted or tampered with during downloading Read More