Apple legal has slammed a cease and desist order against the OSx86 Project - a gathering of developers working to port Mac OS X to work on Intel processor-powered PCs.
Citing the Digital Millennium Copyright Act (DMCA), Apple has forced the site to close down its busy notice boards.
Site administrators told users: "We're sorry to report that despite our best efforts, the OSx86 Project has been served with a DMCA violation notice. The forum will be unavailable while we evaluate its contents to remove any violations present. We thank you for your patience in this matter."
The site describes itself as "the undisputed leader in news and analysis regarding OS X on x86 hardware and Apple's Intel transition."
Shortly before the forums were closed down, a developer had posted a working guide that let others install Mac OS X 10.4.4 on non-Macs.
The site was also the first to uncover Apple's hidden verse within OS X that asked hackers not to steal the operating system.