Since I was having troubles getting Haiku to work under Parallels, I decided to give QEMU under Mac OS X (i.e. “Q”) a try. I’m happy to report that it was a bit easier to get it up and running in that emulator, though I did have to make sure QEMU was set to emulate only a single-processor machine. Any SMP setting would cause bootup to hang at the startup screen.
Leaving networking enabled seemed to work as well, as did selecting either of the two video options. The disk image had to be renamed with a .img suffix for QEMU to recognize it, but then had no problems after that.