Hey guys, I'm in very tight situation with trying to get these new iMacs to netboot. Our other iMacs netboot fine ( but only after running the sudo bless command first) and I just captured an image from one so I know it's working. I have been using the older iMac as my test machine and have had no problems netbooting, deploying, or capturing images with the K2000 and the older imac. Now, with the new model it will not netboot no matter what I try. I have tried the same commands that I run on the other older model which are 

sudo bless --netboot --server bsdp:// --nextonly

sudo bless --netboot --server bsdp:// --nextonly reboot

Has anyone else deployed the new iMacs yet and had any luck with this? I have the image ready to deploy I just can't get these things to netboot! It's very frustrating.


Any help will be appreciated,


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Community Chosen Answer



there is an efi problem with certain models that they cannot netboot across subnets anymore to any pxe server.  may be your problem




Answered 12/27/2012 by: SMal.tmcc
Red Belt

  • Thanks for the links. It's appreciated. I tried those with no luck. Looks like the efi firmware is really screwing us. I have 23 to get installed and I only have until tomorrow afternoon to do it. I'll keep trying everything I can.
    • you can put them on the same subnet as your k2000 or create a RSA on that subnet.
      • Now that actually works, but it gets hung up on the apple logo and just hangs. I tried an older macbook and imac and they boot up flawlessly.
  • The hanging could be caused by the mac boot env you have uploaded does not play well with that model. try uploading a new mac boot env from one of the new machines and make it the default, do not delete the old one so you can switch back to when needed. If this is 10.8 I think you have to wait till k2000 version 3.5
  • I captured the netboot environment from the mountain lion installesd.dmg Would that make a difference which computer I used media manager on to capture that? Yes, it is 10.8
  • I don't believe it will matter what version of OS X you are uploading media from but I have run into issues where the version I am trying to boot into is higher than the media.
  • have run into problems of drivers missing when uploading boot from a different model then the one PXE booting
  • Thanks guys. I'm going to try that today.
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Well 10.8 is not supported by media manager so we are waiting to see if we can get into the 3.5 beta to resolve this issue. Kinda stuck right now.


Thanks for all the help.

Answered 01/07/2013 by: Memphis University School
Yellow Belt

  • I'm having the same issue. I'm using Dell K2000 appliance to Netboot. Older Mac's work well. So far everything but the new Thin IMacs. I can see the proper netboot option and it just goes to a no symbol and boots to itself. The IMac is on the same subnet as the K2 and I did create a new OSX 10.8.2 Netboot environment from it. No luck. I'm running V3.5 of the K2. Any update on this post?
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