UE 5.5 - Error on launch (LS-0013) on Mac

Development Getting Started & Setup
,
1

Just downloaded UE 5.5 on Mac. Every time I try to launch, I get a ‘Launch Failed’ message with Error Code: LS-0013.

I’m running Mac OS Montery 12.76 on a 28 core Mac Pro, which according to the website meets the requirements to run UE. Previous versions have worked fine with no issue.

I tried deleting the web cache folder, but the problem still persists.

I would be grateful if someone can advise how to fix the issue.

2

LS-0013: Game is unable to launch - Epic Games Store Support

3

I tried deleting the web cache folder already from that support link, but the problem still persists.

4

Hi, are you still having this issue/ were you able to get it to work? I am also having the same problem on windows when I try to open Unreal 5.5.

5

Same problem with UE 5.6 on Ventura 13.7.4

Turns out this generic error means the current version of Unreal Engine is not compatible with your operating system. In my case, Ventura can run up to UE 5.5, but starting with 5.6 we need Sonoma or higher.

So LS-0013 means “update macOS” basically. This in turn will also require the latest compatible version of Xcode.