Saw Jackie Mac live on just 2 occasions. The first was on a tour through Western Canada back in 1995/96 - by that time I'd given up hope of ever seeing him play (having mist a few high profile UK gigs in the 70s and 80s). Jackie brought his working band with Steve Davis, Rene, Alan Jay Palmer - in fact pretty well the band on the 'Fire and Hope' CD. The second occasion was at the Jazz Bakery in LA about 6 months later when he had a quartet with Cedar Walton, David Williams and Billy Higgins. Jackie kindly signed my flyer, as did the rest of the band.
The thing that stands out (in addition to his very dignified presence on stage - wearing suit and bow tie as I recall) is the slightly sharp tone on alto and very incisive attack. True to form, he didn't coast either and was still throwing in curve balls in his solos.