where do i find the LINK AND GUIDE to download and install an expansion pack?

all i can find is how to download the base game, which i already have the cracked version of. Im trying to update it (its version 1.2.7.1) but to update it i need to have an expansion pack. I downloaded g4tw's stye sims 3 : supernatural from piratebay, but they didn't specify whether it works for mac. I've tried running the Sims 3 Supernatural Installer but it just does nothing, doesn't open anything. I tried opening Sims3EP07Setup.exe (which i think is meant for windows?) but all it does is extract, and in the new folder it has CERTIFICATE. so I'm stuck on step 1 for the guide they've given with the Supernatural download. Ive tried looking for a MAC version but couldn't find any. I've tried searching threads but they all already have it installed from some guide which I CANNOT FIND. please help, I'm going crazy  

Hello,

You should check the Mac (Fixes) Section from the main page to access all the information how to download and install/crack the games. 

Also, if you read carefully the guide, you can see you need to create .dmg files to install the games. You can read it from here: https://games4theworld.forumotion.com/t11808-brand-new-how-to-install-the-sims-3-on-mac-os-guide-read-it-here-now-new