Tonight I went back in time, to 1986, to play with a Mac II and Mac OS 7.5.5. With thanks to the great video tutorial on Novaspirit, I was able to install Mac OS 7 on my Raspberry Pi3. Here is a video of Mac OS 7 booting. 

Seeing the old Mac OS desktop bring back fond memories of when I first saw a Mac during my freshman year of college. My work study job was monitoring a small lab of five Macs in the computer science department, which gave me plenty of time to play with that new-fangled graphic user interface. 

It was nerd lust at first sight, and I wished for one badly but was not able to afford a Mac until ten years later.