Re: iCloud GB upgrade

I'd check your Mac's specs found under the Apple Logo in the upper left hand corner. I've never heard of a 5GB only computer (unless that's what you have free). I do recommend that your computer have at least 8GB of RAM to run Sims 4 properly. While the game specs say "4GB minimum", always double that to include future content. 

@puzzlezaddict is correct in saying that the game will not run if installed and saved to the Cloud. It must be installed on your computer's hard drive to run properly. I do recommend always backing up your saved games as many things can happen when patching or installing new content. In regards to cost, you'll have to pay a subscription fee to maintain your storage space on the Cloud where as an external hard drive is a one time expense.