@aaronrulz heres the tumblr post about it:
https://sims4studioofficial.tumblr.com/post/155906279756/sims-4-studio-for-mac-appletini-updates-for
In the second image theres a bar at the top of the window with "file", "edit" etc. In one of those drop downs there should be a "my cc" option, which will bring up a window with your mods folders to the left and a pic of the cc item on the right. From the looks of it, the mac version has been updated twice since the "my cc" feature has been added so I'm assuming it should be there somewhere, but I'm on windows so I can't say from my own experience.