Well, I doubt that; people have been using Lemmings on the Mac for far longer than you have been on the board, so I bet it's come up in the past. I have certainly known about the board, or its previous incarnation, longer than you (although I never really posted a lot, so not many of you will remember me from before, I bet), and famous Lemmings players like Ephraim Vishniac used macs, and I remember seeing a specific walkthrough by him (or someone) which addressed the gameplay differences in Mayhem 26.
