To use MacDock, simply launch the program. MacDock will be visible at the bottom of your screen. You will see your running applications on the list (limited to 7 applications).
Clicking on any of them switches you to the app.
On tinkerdifferent.com, the author revealed his inspiration – “Ok – I’ve been through the first 5 chapters of the “Macintosh C Programming Primer” diligently typing in all the sample programs along the way and tinkering with them. But to really practice I have to write my OWN program… now wtf do I try and make? After seeing fun reddit post on r/vintageApple where someone posted a mock up of what the Dock might look like in the old System software, I thought that’d be it.”
Download MacDock on Github here