Re: 2017 MacBook Pro, which version of Sims 4?
I've moved your post out of the Legacy Edition thread as it doesn't apply to you (and edited the title to reflect your question better ๐ )
Your 2017 Mac absolutely supports Metal. What exact issue are you having trying to load the game? Please can you also provide more information about your Mac. Instructions on how to do so and what to provide here - http://answers.ea.com/t5/The-Sims-Mac/READ-FIRST-Sims-4-Mac-Help-Guides-and-Troubleshooting/m-p/4612396/highlight/true#M162