On Mac Computers
You will not be able to be Geo-Located should you have VPN or Remote Desktop Software on your computer, or any software that emulates a Proxy server. You will need to disable this while playing the games.
For Mac, to disable the most common types of software please take a look at the following instructions:
How To Disable Remote Management (ARDagent) On A Mac
How To Stop LogMeIn Running In The Background On A Mac
How To Stop TeamViewer Running In The Background On A Mac
How To Disable AppleVNCServer From Running In The Background
Once this is disabled please try the games again, as you should be able to access them.