Hello. Same problem here. I can’t open Hearthstone on my macbook pro os High Sierra 10.13.6.
It crashed a few times on Saturday afternoon (15/01) and I can’t open it since. It starts opening and then It says “your game timed out as it was requesting data from the hearthstone utility service ”.
I tried opening other games, like Heroes of the Storm. No problem there.
I also tried to log in with a different account and open Hearthstone and it worked fine!
I tried several fixes I found at the forums like deleting the game and all files and reinstall the game twice and it didn’t work. I also deleted the Bnet App and reinstalled it. I tried every fix I could find. Nothing worked…
I started thinking there is something wrong with my account, but it works just fine on other devices.
Finally, I tried contacting the support, but I couldn’t submit a ticket.
Please get back to me with an explanation and a solution.