I worked for a Mac vendor at the time, and Copland never got beyond slideware for us. It was ridiculously ambitious: an (Apple developed) microkernel that would

I worked for a Mac vendor at the time, and Copland never got beyond slideware for us. It was ridiculously ambitious: an (Apple developed) microkernel that would have a MacOS classic server, a multiuser next gen MacOS, plus even claims it could be possible to have an NT server on it. Complete UI customizability, etc, etc. Essentially they were promising something comparable to NT 4, from an organization with a fraction of the team Microsoft used to deliver it.