" can download that installer, or the developer installer, from one computer and copy it to any other, and it works perfectly well,
even if that computer is not enrolled in any beta program."
Mission control we have a problem here. The computer is automatically "enrolled" via the profile. I have included a screen shot of the modification it does to the "settings" app. Please notice the "Your computer is set to receive beta software updates..."
That is how it is "enrolled." All I did was install the profile and then the App Store allows the download. A download sent to a specific coompiuter will not load on another unless one builds a USB drive as I previously stated. If one checks on line there are those who have written such a utility to make the bootable drive orit can be done by using 'termina'l and commmand line do it yourself, which is a whole lot harder.
Apple wants all of its users to use the App Store.
Here's a screen shot from the developer download. Clicking on the download first downloads a profile to my computer and then allows the App Store to download the GM.
Now let's quit this stuff and move on.
[doublepost=1473443034][/doublepost]The original author of this thread said this:
I tried copying the 4.7GB "Install macOS Sierra" to my other mac, which is still running OS X 10.11 El Capitan, it won't open at all? Any ideas?
And you mentioned this:
If the OP's installer isn't running, it's either something wrong with his particular computer or his particular installer.
The original is about loading Sierra from the full download not an installer!
Moving on!!!