Whatever the reasons for upping the level entry of the OS to install mamp stack, it'd be nice for mac users to be able to download older versions compatible with older OSes.
Why not leaving this possibility open ? A tiny place on your servers ?
Thing is, we, mac users, enjoyed a streak of perfectly stable systems (from 10.10 up to 10.12, not so sure about High Sierra) and don't update that often.
Anyhow, thank you for bitnami. It saved my ... several times.