New User Questions, Please

[Robert11]

Sr. Citizen now, very, so please put up with a few very basic questions.

Eyesight poor, and the idea of using on my mac sounds really great.

But I know nothing about github, etc.

Blame it on old age now.

May I please ask:

What, very exactly, should I download, and from where ?

I would like to use on my mac with an Icom R-8600 receiver.

Might someone, please, walk me thru the steps to do this, assuming it is possible.

What else should I know, but am not asking ?

Is there a User Manual somewhere ?

Much thanks,

Bob