Re: Problems installing CC
@LittletaIks, first of all you need a program like Stuffit Expander to make sure that you can uncompress a file. Stuffit Expander should be free and you need to download the version that matches your version of your Mac OS. "Zipped" files usually end in the extensions ".zip" or ".rar". In order for Sims 4 to run CC or mods, the uncompressed file has to end in the extension of ".package". Once you uncompress your piece of CC, you place it in your Mods folder in the Sims 4 folder (Documents > Electronic Arts > Sims 4 > Mods). The Tray folder is where houses go if you download them from sites other than the Gallery.
Please report back.