Re-Install Sierra 10.12.6 or 10.12
I've been trying to reinstall Sierra (latest version of MacOSX that will run on this iMac).
I have built a bootable partition and it boots up fine but when I click on 'Install MacOSX' it starts to run and then gives me the
"Install MacOS Application is Damaged, Can’t be Used to Install MacOS”
There isn't anything physically wrong with the application package. It was used previously to install the MacOSX Sierra.
So what is causing this error?
I have reformatted and downloaded Sierra now at least three times and still get the error.
I have reset NVRAM several times before the install. Internal disk is erased and formatted MacOSX Journeled with GUID Partition Map.
At this point, I'm trying to figure out what is the problem.
Any help is appreciated.
Earlier Mac models