I've looked everywhere on this forum, but can't find a tech manual for a 1997 x300 xj6. The JTSCD Disc I or II is for Windows, and other places are for the wrong year. Can anyone help?

 

Unfortunately there are no versions of the VSM that are able to run natively on a Mac OS. Your options are to run the JTIS CD's on the Mac using vitualisation software like Parallels or VMware or in a partition with Boot Camp.

The only other option I know of is to buy a version of the VSM that has been converted to PDF format so it can run on any platform. This version costs $20 so not too bad.
Jaguar XJ6 XJ12 X300 '94 '97 Workshop Service Repair Manual Wiring Manuals Parts | eBay

Of course there is also the actual printed editions of the VSM too

 

AllanG, the link you posted from eBay seems to be exactly the same thing that is available as a download (PDF file) in sticky X300 'HOW TO' quick links... X300 Service Manuals 95, 96, 97 which I've been using quite happily on my Mac. Nad it seems rather complete. Or at least it never gave me any headache