MKMapView appears red on iOS 18 simulator + Xcode 16

I've had the same problem for a while now. I am currently using Xcode version 16.2 (16C5032a). The problem is with the iOS 18.2 and iPhone 16 Pro Max simulator. Not with the iPhone 15 Pro Max Simulator and iOS 17.5. I can also zoom up to 24 meters and the colors remain the same. The problem starts at a zoom range of 1500 meters and not everywhere. Play around with the coordinates from the simulator. It works in Cupertino, San Francisco or other large cities, but not in rural areas. In Europe, the colors are red almost everywhere when zooming.

I have created a repository for the project where the issue occurs.

• https://github.com/CH3COOH/SampleXcode16IOS18MKMapKit/

In my environment, the issue arises with the following minimal code:

import SwiftUI
import MapKit
 
struct ContentView: View {
    @State private var region = MKCoordinateRegion(
        center: CLLocationCoordinate2D(latitude: 35.6844779, longitude: 139.7512224),
        span: MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05)
    )
 
    var body: some View {
        Map(coordinateRegion: $region)
    }
}
 
#Preview {
    ContentView()
}

I believe it's not a program bug but rather an issue with the iOS simulator. When the Excluded Architectures setting is enabled, the following problems occur:

• The app freezes when displaying SFSafariViewController
• The app freezes when displaying UIImagePickerController
• The map appears in red when using MapKit

@ch3cooh393, great work identifying what's happening here! Would you mind opening that as a bug report with your project attached, and then posting the FB number here? That will let you get informed of the status of the bug report.

As to the Excluded Architectures detail here, it's really important that folks are looking to address any dependencies in your app that are requiring that you to continue using the x86_64 CPU architecture in the simulator. You should have a plan in place to make sure your libraries that aren't yet rebuilt for Apple silicon get rebuilt with Apple silicon support, or be talking with your library vendors to make sure they are providing you with an updated version that includes Apple silicon support. We have a Technote that goes into detail on what you need to do and why.

—Ed Ford,  DTS Engineer