However, in our case we couldn't tell what was wrong and were working with Apple Support for well over 30 days to resolve the problem

We have also spent hours on the phone with Apple Support

After becoming convinced that Apple Support had no solutions for us we ask to return the computer

Apple support will give you the run around with a friendly face.

It's fast, a really nice display, and I really like the dark grey finish as it's easier to "look at" than the silver-bezeled iMac it replaced