My main drive in my 2006 MacPro has gone down and in seeking to use FCP 6 backed up on another drive I find that Apple is demanding the serial number and I can't find it even though they say it is in the packaging which I still have. There are three numbers on the bottom of the black box containing the books but none of them are accepted by Apple. Also, the Discussion Forum in Apple for FCP 6 is apparently barring fresh entries after about 2011 Anyone? T.I.A.
I'll answer my own input . . . !
Found the relevant serial numbers after a hunt through all the old stuff I could find and successfully re-installed FCP 6. Two serial numbers were required because my progs were upgraded ones from the original FCP 1.