About ten years ago, Be wanted to have BeOS be an alternative OS you could run on Macs. Be did in fact get the first version running okay. But Apple was in the midst of one of its big hardware changes, so Be needed tech docs for the motherboard to do a really good job of it. Apple never supplied that information.
BeOS advocates at the time said: just go ahead and reverse engineer it. That's what the Linux people did. The powers that be at Be said: nope, we don't play that way. If Apple doesn't want us on their computers, then we're not going there. Be subsequently refocused on standard PC hardware.