There is "Apple" written in the title.. at the beginning.. so yea.
and your 6S still has the lightningport.
Its apple.. so also yes it works... why wouldnt it?
We only sell original accessories unless they are declared as universal. It is also apparent in the description of accessories from third-party manufacturers.
I don’t think this is the thing you are looking for.
As far as I know the new MacBooks do have a USB-C type connector. So you need to look for USB-C to lightning .
Hope this helps