Hi All - just after some options on how to get my guitar to make a midi signal for my Mac... any ideas... anyone.... anyone... Bueller?

:-) B
^ That's a monophonic adapter, so you won't be able to play chords or more than one note at a time.

If you're really serious about midi, you should get a keyboard and use that.
Telecaster - SG - Jaguar
Princeton Reverb, Extra Reverb
P-Bass - Mustang Bass
Apogee Duet 2 - Ableton Suite