# \[Issue\] Problems with Cesium and UE 5.5.3 on MacOS/iOS

**URL:** <https://community.cesium.com/t/issue-problems-with-cesium-and-ue-5-5-3-on-macos-ios/38984>\
**Category:** Cesium for Unreal\
**Created:** [March 1, 2025, 12:53pm UTC](https://community.cesium.com/t/issue-problems-with-cesium-and-ue-5-5-3-on-macos-ios/38984 "2025-03-01T12:53:22Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![Kevin\_Ring](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kevin_ring/32/2003_2.png) [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)\
**Post date:** [March 27, 2025, 2:35am UTC](https://community.cesium.com/t/issue-problems-with-cesium-and-ue-5-5-3-on-macos-ios/38984/13 "2025-03-27T02:35:04Z")

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I believe this is an Unreal Engine bug. I’ve reported it to Epic and it should be fixed in the next release. In the meantime, there’s a workaround here:

> [@\[Solved\] iOS apps distributed to the App store crash](https://community.cesium.com/t/solved-ios-apps-distributed-to-the-app-store-crash/29401/6):
>
> Just an update on the best workaround here… FORCE\_ANSI\_ALLOCATOR may not work well in the latest UE versions, and even if it does it may have unintended consequences (such as a reduction in performance). Instead, I now recommend that you make a change to a script in the Xcode project. If you open Intermediate/ProjectFiles/[project name] (IOS).xcodeproj/project.pbxproj, you’ll see a section like this: ED01E0DF7686EEC1CE350CF9 /\* Generate dsym for archive, and strip \*/ = { isa = PBXShellSc…

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