PeterSThere are lots of IP to location utilities/sites that you can use, they are not 100% accurate but can provide some usefull information. Try http://whatismyipaddress.com/staticpages/index.php/lookup-ip http://locateip.co.uk/index.php But there are hundreds of others out there At the very least you can get the ISP information that the IP relates to, you may even get a map showing the location.
TBK Consultingdo a google search for keyloggers for mac, and then find out what kind of installer it uses and you can script the install silently by finding the /flags to use with that particular installer ...