Warning: Geeky stuff ahead!
The Parallels Workstation virtual machine software for the Intel Macs has a BIOS which doesn’t support network booting.
I wanted to simulate an LTSP workstation, which would boot over the network from our Linux server. Here’s how I did it:
From this I grabbed the ISO CD-ROM image eb-net.iso and set up my virtual machine to use this as the CD instead of the physical CD drive. I also configured it to boot from CD first, and, for my purposes, I removed the hard disk from the config as well.
Sure enough, it boots up just fine and I have an LTSP terminal in a window. Much easier for experimentation than rebooting my embedded device all the time.