I thought I'd contribute my own gaming-and-Macintosh reminiscence on this sad occasion.
In my early years of graduate school, though I had no regular gaming group, I was still coming up with all sorts of things for gaming. One of those - lost, alas, in the mists of floppy disk breakdown and software obsolescence - was a random dungeon level generator using HyperCard.
HyperCard had an easy, snap-to-grid function that let you draw rooms and corridors with ease, and I eventually figured out how to randomize the size, shape and position of generated room objects. Over on the side, the program spit out a key with features, monsters, treasures, tricks and traps for each room.
All this, of course, was before the Internet as we know it existed. If I'd been able to post the stack up and share it with the kind of community that visits this blog, it wouldn't have died an obscure death, and I would have had the motivation to make it a lot better than it ended up being.
Look to the right, and see my downloads: "PowerPoint Mapping," "Old School Dungeon Encounters," "Endless Bag of Tricks," "Bag of Problems." Those are just the fragmented and worked-over pieces of that lost HyperCard stack. Where now, indeed, are the bytes of yesteryear? Who will put HyperDumpty together again?