A company called Psystar is selling plain box PCs for $399 named OpenMac, with hacked versions of Mac OS X 10.5.
From their Questions and answers page:
Can I run updates on my OpenMac?
The answer is yes and no. No because there are some updates that are decidedly non-safe. Yes because most updates are not non-safe. It’s best to check on InsanelyMac for this information but when in doubt don’t update it. You may have to reinstall your OS X if it is a non-safe update.
* Take note of some of the grammar
As reported by Macrumors:
For $399, you get a tower computer with the following specs:
- 2.2GHz Intel Core 2 Duo
- 2GB of DDR2 667 memory
- Integrated Intel GMA 950 Graphics
- 20x DVD+/-R Drive
- 4 USB Ports
- 250GB 7200RPM Drive
Psystar is marketing this as a cheaper and more expandable alternative to a true Apple Mac.
The company claims that the machine is Leopard compatible with some "minimal patching" but does offer Leopard pre-installed. This is reportedly accomplished by using parts that are known to be compatible with Mac OS X Leopard, as well as the use of an EFI emulator.
The use of the Mac OS on non Apple-branded hardware is a violation of its End User License Agreement (EULA) and is specifically prohibited.
From the End User's License Agreement That ALL agree to BEFORE installing the Mac OS:
You agree not to install, use, or run the Apple Software on any non-Apple-labeled computer, or to enable others to do so.
[UPDATE] The Psystar site went down for a while. They've changed the name to "Open Computer,"