Check out this fun visual history of Mac OS X/macOS
<p style="margin-left:0px; margin-right:0px">GitTower, which makes the Tower Git client, is celebrating the launch of macOS Sierra with an update of its info site, <a target="_blank" href="https://www.git-tower.com/blog/history-of-macos/" rel="noopener noreferrer">An Illustrated History of macOS</a>. </p>