Hi there! I'm sorry to hear that Brawlhalla isn't opening for you. Let's see if we can get you back into the game quickly. To help me understand better—when you try to open the Brawlhalla app on your Mac running OS X 10.15.7, do you see any error messages or does the app just not respond at all?

In the meantime, I can walk you through some steps that often help with app launch issues on macOS:

1. Restart Your Mac: Sometimes a simple reboot can resolve temporary glitches.

2. Close Background Apps: Make sure no other applications are interfering, especially other game launchers.

3. Check for Updates: Ensure your macOS and Brawlhalla app are both up to date.

4. Reinstall Brawlhalla: If you're able, uninstall Brawlhalla completely and then download it fresh. This helps if some files got corrupted.

5. Check Internet Connection: Make sure your network is stable, as Brawlhalla requires an online connection to launch.

6. Clear Cache/Data (if applicable): Sometimes clearing temporary data helps, although this is more common on mobile or Steam.

Since you are on Mac, there's no Steam cache verification, but a fresh installation often works well.

If any of this sounds like something you've already tried, please let me know so we can explore deeper options like checking permissions or looking at system logs.

Do any of these steps sound doable for you right now? Let me know how it goes or if you notice any specific behavior when trying to open the app!