I’ve managed to get OS X 10.8.3 running on my AMD processor ESXi server, although VMware Tools needed a little modification and for some reason the ‘Fit Guest’ doesn’t appear to work which is slightly annoying. Maybe someone with more knowledge will know why?
For anyone interested in getting OS X 10.8.3 working on an HP Microserver N54L running ESXi 5.1 U1 here is a brief list steps:
Thanks for the guide, I have looked at the HP ProLiant MicroServer a number of times as a possible ESXi host, but always been put off by the AMD processor and my desire to run OS X as near to Vanilla as possible, but if you are happy to modify your OS X installation the MicroServer offers an inexpensive root to ESXi virtualisation, it will however run vanilla Linux and Windows VM's without issues.
An alternative, not quite as inexpensive but does use an Intel Core i3 or Xeon E3 processor is the HP ProLiant ML110 G7, so offers a vanilla install of OS X, once the "Unlocker" has been applied to ESXi.