The launcher scans your active processes to prevent updating games that are currently running.
Although Epic Games haven’t commented on whether they’re working on this issue, there’s a workaround to it which this guide covers. For some people, the download gets stuck at any random percentage. This allows your Mac to put more resources into running the game, rather than being used to run the likes of. It's a strategy game, set in a managerial, turn-based and 4x themes and it was released on Mac, Windows 3.x, Amiga and Atari ST as well. While Valve's Steam has been the go-to place to download PC games, Epic is looking to get in on the action.
You can try making your settings match the image above depending on your system, and if it continues to crash you can keep lowering them until the crashing stops.
