I decided to try out what Darryl Lee wrote since I have the same computer (might be a 13-inch if that's important) ...and it worked!
I went from El Capitan 10.11 and upgraded to Sierra 10.12 and so far it's worth it since I can play on 1.18.1 now. I definitely recommend to try it if you're able to.
Edit: Thank you Darryl for the tip! I've had so many issues lately with the launcher and haven't been able to play for some months on and off now, so I'm genuinely thankful and relieved.
Jessica Ibacache Lidström
I decided to try out what Darryl Lee wrote since I have the same computer (might be a 13-inch if that's important) ...and it worked!
I went from El Capitan 10.11 and upgraded to Sierra 10.12 and so far it's worth it since I can play on 1.18.1 now. I definitely recommend to try it if you're able to.
Edit: Thank you Darryl for the tip! I've had so many issues lately with the launcher and haven't been able to play for some months on and off now, so I'm genuinely thankful and relieved.