MKMapView appears red on iOS 18 simulator + Xcode 16

I have the same problem. The background goes to bright red..If I zoom way out it shows normal. but just a little zooming in results in going back to red.

Very frustrating!

Same, has anyone resolved this issue?

I just ran into this issue as well... weirdly, there are parts that do not get red, like London. But the majority looks like this:

Yes, I'm also facing the same issue. Does anyone find solution for this? Also, why is it happening only with iOS 18?

That's very odd. I'd like to verify a few basics here:

1. Do you have any extra simulator debug settings enabled, like Debug > Color Blended Layers, or any others under the Simulator's Debug menu?
2. You can reproduce this only in the simulator, but never on device?
3. Does this reproduce with a brand new app created from Xcode's File > New Project with just a Map or MKMapView?

— Ed Ford,  DTS Engineer

@DTS Engineer

Thank you for your attention. For my case the answer is following:

1. No, none of the Debug option is enabled
2. Yes, it only happens in the iOS 18 simulator but never on device. Also, iOS 17 and earlier is not affected
3. It seems not. (I'm still using UIKit for my project so tried with Storyboard for reproducing)

Thanks for those details @yayoi-d. The next time you encounter this, I'd like you to create a test project that starts from your real code base, and begin shrinking it down, since you're saying that a brand new Xcode project doesn't reproduce. The link above has good advice to use here, and going through a fairly course effort to shrink the project may reveal something specific to your project that is of interest. And if you get the code size down to effectively "just" a MKMapView with not much else when starting from your real app, and can still reproduce it then, I would file a bug report that includes the shrunken project, a sysdiagnose, and also a video capturing what you're seeing. If you file a bug report, please post the FB number here.

— Ed Ford,  DTS Engineer

@DTS Engineer

Thank you for your advice. I'm also facing the same issue. Just run the Maps.app in any iPhone Simulator (iOS 18.1) and you will see the red screen while zooming in.

We are experiencing the same problem.

I am also experiencing the same thing, I am using iPhone SE 3rd gen iOS 18.0 simulator.

Oddly enough if I am in a different location it renders fine, but for some reason it's red for the entire New Mexico

I'm surprise that these Apple developers are unable to reproduce this issue. Wow!

I'd like folks reproducing this to file bug reports with the following:

• Screenshots or video of what you're seeing
• Confirmation that none of the graphical debugging options in the simulator menus that I previously mentioned are enabled
• A sysdiagnose from the simulator, which you can gather by running xcrun simctl diagnose in Terminal

Once you file your report, please post the FB number here for my reference. And if you've never filed a bug with Apple before, please have a look at Bug Reporting: How and Why?

—Ed Ford,  DTS Engineer