Indexhibit Support

I am trying for days now to get indexibit installed on my website (studuo.org). I followed all the instructions and the DNS/Nameservers have to be linked now. I am using 1eurohosting as a host and my domain name I have via Hostnet.nl

What am I doing wrong, I use Filezilla and have the downloaded package in the Public/HTML folder of my domain. Maybe because i am using a mac?

No - many (or most) users use a mac.
You just need to verify which is the root directory of your server with your host.
Simply send them and email or contact them.
They ought to help you out with something simple like this.