Yes, I saw that, but the first rMBP also had a special OS version (if memory serves), so I thought it was worth a shot. I'm seriously considering sending in a BR for them to properly and easily identify the different build versions for different models along with their respective updates - this is getting way too confusing. Additionally, MAS should not prompt for an update if it can't be installed on a particular machine.
There is a KB article that states which builds were shipped with which machines, but it is still kind of vague when it comes to 13" vs 15", etc.
I have a Mini that supposedly shipped with that same build, and I updated it without a hitch.
My only suggestion, at this point, would be to clone the hard drive to an external (make sure it boots the machine), then boot to the Recovery HD and reinstall Mountain Lion.
When complete and it runs the setup assistant, Migrate from the external clone.
The plot thickens...... according to the OP (one of his posts on previous page) he has:
Software OS X 10.8.1 (12B2100)
And, according to the link you posted for the builds, the 12B2100 is for the 13" rMBP.
So my links to the updates should work? But they don't....
I think I'd take it to Apple and let them sort it. Installing updates should not have to involve cloning, using recovery, etc.
Retina, Mid 2012
Processor 2.3 GHz Intel Core i7
Memory 8 GB 1600 MHz DDR3
Graphics Intel HD Graphics 4000 512 MB
Serial Number ------------(...)
Software OS X 10.8.1 (12B2100)
Built-in Color LCD Display
2880 x 1800
Intel HD Graphics 4000 512 MB graphics
Your Mac contains 2 memory slots, each of which accepts
a 1600 MHz DDR3 memory module.
All memory slots are currently in use.
Did u mean 11E2068/11E2617/12A269 is suitable for rmbp15"??
Original Mac OS X included
(see Tips 1 and 3)
Later Mac OS X included
(see Tip 1)
Mac OS X Build(s)
(see Tip 2)
MacBook Pro (Retina, 13-inch, Late 2012) Oct 2012 10.8.1 10.8.2 12B2100, 12C2034 MacBook Pro (Retina, Mid 2012) Jun 2012 10.7.4 10.7.4, 10.8 11E2068, 11E2617, 12A269
Well, according to what you're saying, your current build is 12B2100 and, since you haven't updated, that should be the original version.
However, that is the build the late 2012 13" MBP came with - see this link (which was posted here previously):
You should have 11E2068.
So, the question is: how did you manage to install a build that is not for that machine?
When you are dealing with the new machines and the download-only OS, you cannot use just any OS version - you have to use your machine and the recovery method which will install the exact version yours came with. Did you do any OS installs since getting the MBP?
If you still plan to call Apple, make sure you mention your machine model, the OS build number it came with and that you now have a build for a different machine installed.
My only suggestion at this point is that you would have to use your recovery partition, boot into it (pressing Command + R during bootup), erase the drive and let the recovery process reinstall the correct build version.