I've created a NetBoot image for my newer 10.8.3 machines to boot to but when I NetBoot them I see a circle with a line through it. I've seen this before and creating a new nbi from the newest machine has seemed to fix the problem. All lower models in 10.7/10.8 seem to work but these newer models. What could it be?
Same here, we've actually created NBI's for the different models (using the latest release) just in case our "agnostic" NBI doesn't work. Currently some (but not all) MacBook Air and iMacs don't boot from the Default NBI, so our imaging folks need to hold OPTION key to select the appropriate NBI. So forcing NBI's based on model doesn't seem to work.
Meh...who ever said Apple was an enterprise company. :(