iOS26 FCM Notifications

[nosferatu500]

Description

Hi, I suspect this might be a Simulator issue, but I’d like to confirm to be sure.

Up until now, I’ve been using the iOS Simulator (iOS 16 to 18) to test FCM notifications via the Firebase Console, and everything has worked as expected.

However, when testing the same behavior today using Xcode RC and the iPhone 17 RC Simulator, I’m no longer receiving any notifications.

I currently don’t have access to a physical device that supports iOS 26, so I’d like to confirm whether this is a Simulator-specific issue or if the Firebase SDK requires any additional updates to work correctly on iOS 26.

Apologies if this has already been covered, and thank you in advance!

Reproducing the issue

No response

Firebase SDK Version

12.2.0

Xcode Version

26 RC

Installation Method

Swift Package Manager

Firebase Product(s)

Messaging

Targeted Platforms

iOS

Relevant Log Output

If using Swift Package Manager, the project's Package.resolved

Expand Package.resolved snippet

Replace this line with the contents of your Package.resolved.

If using CocoaPods, the project's Podfile.lock

Expand Podfile.lock snippet

Replace this line with the contents of your Podfile.lock!

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[SergioB-dev]

However, when testing the same behavior today using Xcode RC and the iPhone 17 RC Simulator, I’m no longer receiving any notifications.

I'm noticing the same behavior.

[rizafran]

Thanks for reporting this, @nosferatu500. I was able to reproduce the issue using iOS 26 (both in Xcode 26 and 16.4) but not in iOS 18. I found out that the notification is not working because the didRegisterForRemoteNotificationsWithDeviceToken is not being called and didn't return any token. I saw these related issues from Apple forum:

• https://developer.apple.com/forums/thread/797507
• https://developer.apple.com/forums/thread/795433

I suspect that this is related to Apple simulator since the developers confirmed that it's working on physical device and not in a simulator.

[rizafran]

Hi @nosferatu500, you may check more information from the engineer in #15327 (comment).

[nosferatu500]

@rizafran ,

Hi! Thanks for the info. I just checked the issue using the Release version of Xcode and I have some details:

Simulators:

• iPhone 16 + iOS 26 → No issues
• iPhone 17 + iOS 26 → didRegisterForRemoteNotificationsWithDeviceToken is not being called

My host machine is running macOS15.6, so I'm not sure if upgrading to macOS26 would resolve the issue on the iPhone 17 simulator...

Real Device:
I can confirm that there are no issues on a real iPhone 15 running iOS 26.
(I haven't had a chance to test on a real iPhone 17 yet.)

[Ardazafer]

Hi @nosferatu500, I’m running into the same issue. I’m already on macOS 26, so upgrading macOS does not resolve the problem. FYI

[FonTain1991]

@rizafran,

Привет! Спасибо за информацию. Я только что проверил проблему в версии Xcode Release, и у меня есть некоторые подробности:

Симуляторы:

• iPhone 16 + iOS 26 → Без проблем
• iPhone 17 + iOS 26 → didRegisterForRemoteNotificationsWithDeviceTokenне вызывается

Мой хост-компьютер работает под управлением macOS15.6, поэтому я не уверен, что обновление до macOS26 решит проблему на симуляторе iPhone 17...

Реальное устройство: Могу подтвердить, что на настоящем iPhone 15 под управлением iOS 26 проблем не возникнет. (У меня пока не было возможности протестировать это на настоящем iPhone 17.)

Hi, i have it too iPhone 16 + iOS 26 + macOS 26 and it also doesn't work