Hi
I'm new to this too but this is how I managed to get it running. I installed Python 3.6.4 then I downloaded the time-lapse project files then opened a Terminal session on my iMac. Once the window opens, change to your downloads folder using cd Downloads then to the folder the zip file extracts to, um3timelapse-master using cd um3timelapse-master. You are now in the folder you need to work in.If you forget the name, just type ls as a terminal command to list the files in that folder
From here, you can run the python scripts directly but you MUST remember that OS-X co