Trouble installing

I am completely new to the sims 4 studio and am having trouble installing the sims 4 studio on my Mac. Every time I download the harmony community tested version I try to extract the installer it says error:invalid format. I just found out that there is a version for Macs called appletini but its a beta version do I have to use that for the install to work? If anyone has any ideas on how to help, fix this problem, or give me a walkthrough on how to install please let me know! Thanks!
-Sammy