Why can't I Download the Sims 2: Super Collection?

So my sister is a part of my family sharing plan where if she buys an app I can download it too, so she bought the sims. I wanted to download it after her by looking at my family's purchases. I found the app which says to click to install, so I did and it says this " We could not complete your purchase. There is not enough disk space availible to install the product." After that I looked on my storage in Macintosh and it says i have 10.95 GB free. So I didn't get why I was unable to download it, since I had checked the requirements that the sims 2 asks for which is 7.5GB and and a minimum of 10GB free of storage space. Do I need to have a complete total of 17GB free? thanks if you can help.