How to download older version?

Hi, My Macbook pro currently runs Mac OS 10.11.6 (this is the max update i can have on my device). How can i download the previous versions? As the new download is for 10.13 and higher.

Old versions are archived here:

You are going to have to go back a long ways to find something compatible with OS X 10.11. Unfortunately, there is no reverse compatibility guide that tells you what the system requirements were for older versions of Manager.