Fix Guide: Epic Games Launcher Won't Launch Games on Sequoia
Symptom: Epic Games Launcher on macOS Sequoia opens successfully, but clicking "Launch" on any game either does nothing, shows a brief loading indicator then stops, or displays "Failed to launch game" error. The game process appears briefly in Activity Monitor then disappears. Console logs show xpcproxy errors or "Code signature invalid" messages.
Why this happens
macOS Sequoia tightened Gatekeeper requirements for dynamically loaded code. Epic Games Launcher uses a custom loader (EpicGamesLauncher Helper) that injects DLLs and frameworks into game processes at runtime. The syspolicyd daemon now validates code signatures for every injected library, and many Epic games bundle unsigned or ad-hoc signed components that fail validation. Additionally, Sequoia's amfid (Apple Mobile File Integrity Daemon) blocks execution of binaries downloaded through non-App Store mechanisms unless they pass stricter notarization checks.
The launcher's sandboxed environment prevents it from granting necessary permissions to game binaries.
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Fix 1: Clear Quarantine Attributes from Epic Games
Remove Gatekeeper quarantine from Epic Games and its titles:
# Remove quarantine from Epic Games Launcher
sudo xattr -r -d com.apple.quarantine "/Applications/Epic Games Launcher.app"
# Find installed games (usually in ~/Library/Application Support/Epic/)
# Example for Fortnite:
sudo xattr -r -d com.apple.quarantine ~/Library/Application\ Support/Epic/EpicGamesLauncher/Data/Games/*
# If games are in Applications folder:
sudo xattr -r -d com.apple.quarantine /Applications/YourGameName.app
# Clear downloaded installer cache
sudo xattr -r -d com.apple.quarantine ~/Library/Application\ Support/Epic/EpicGamesLauncher/Saved/
Fix 2: Reset Gatekeeper and TCC Permissions
Reset system security policies for Epic Games:
# Reset Gatekeeper for Epic Games Launcher
sudo spctl --add "/Applications/Epic Games Launcher.app"
sudo spctl --enable
# Reset privacy permissions for Epic Games Launcher
tccutil reset All com.epicgames.EpicGamesLauncher
# Clear Launch Services database
/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain user
# Restart syspolicyd
sudo killall syspolicyd
# Reopen Epic Games Launcher
open -a "Epic Games Launcher"
You'll need to re-grant permissions (Accessibility, Screen Recording) when prompted.
Fix 3: Bypass Launcher with Direct Executable Launch
Launch games directly without the Epic launcher:
# Find game executable (example for Fortnite)
# Game binaries are usually in:
# ~/Library/Application Support/Epic/[GameName]/[GameName].app
# Example:
open ~/Library/Application\ Support/Epic/EpicGamesLauncher/Data/Games/Fortnite/FortniteGame/Binaries/Mac/FortniteClient-Mac-Shipping.app
# For other games, navigate to their installation directory and look for the main executable
Note: Some games require Epic's authentication service, so this may not work for online games.
Recommended Tool: **Whisky**
Whisky is an open-source compatibility layer for running Windows games on macOS using CrossOver technology. Instead of relying on native Mac versions (which often have Gatekeeper issues), Whisky allows you to run the Windows version of Epic Games Launcher and games with better compatibility. It bypasses macOS Sequoia's strict code signing requirements by running games in a Wine-based Windows environment. Whisky includes automatic configuration for popular titles, better performance than many native Mac ports, and doesn't require clearing quarantine attributes since games run in an isolated container.