Thanks for taking the time to respond Ken, digging through the old Sierra Newsletters I found a quote from you saying pretty much the same thing… the Black and White versions didn’t sell well. From the timeline I reconstructed, it seems that Sierra launched colour versions just as the move to SCI had started, and soon after stopped selling any AGI games for the Macintosh.
At the moment it seems to be the last “patched” Mac versions of the AGI games are the hardest to find, it looks like the only way to get the fixes was a patch disk direct from Sierra, so not sure how many people know about those or paid the fee to get them. I just wish I could find out if the 16 colour graphics issue was ever fixed. Too bad that the source code is probably long lost by now.
Hope the sailing life is treating you well, and thanks again to you and your wife for my favourite games of my high school years.