Sims 4 Outdoor Retreat - Cant download

[simbuildsam]

I bought TS4 Outdoor Retreat a while ago. Now I want to install it on my mac, but according to Origin, I have to buy it again and therefore can't download it. I am 100% sure that I am logged into the same EA account as the one I used to purchase Outdoor Retreat, so it really should show up. I paid 20 bucks for this pack and want to play it, so can anybody tell me why it doen't appear in my library and how i can still download it?