I’ve been having the same issue for a while, testing new versions of UE, Xcode and macOS as they come out.
Currently I have Unreal Engine 5.5.3, Xcode 16.2, macOS Sequoia and can’t build existing projects or create new ones.
There was mention above of a compatibility chart, where do I find that? and will going to an older version of Xcode solve the issue?
Does anyone have a work around for this? Other than move to another engine 