ODK Aggregate installation on mac

Hello every body. Hi I'm a new ODK user and I have some problems installing ODK Aggregate on my Mac. I would like to have clear guidance over it please. thank you so much.

We provide docs at https://docs.opendatakit.org/aggregate-install. Have you read those? If so, where are you stuck?

I would like to know if I can choose any folder for ODK Aggregate installation?
then what is the best server that I have to use on Mac? What's the signification of the instance name?