Can't upgrade firebase_core to 3.4.0, because macOS deployment target

[gnprice]

When I try upgrading our dependencies with tools/upgrade pub, I get the following error from CocoaPods:

+ pod update --project-directory=macos/
Update all pods
Updating local specs repositories
Analyzing dependencies
firebase_core: Using Firebase SDK version '11.0.0' defined in 'firebase_core'
firebase_messaging: Using Firebase SDK version '11.0.0' defined in 'firebase_core'
[!] CocoaPods could not find compatible versions for pod "Firebase/Messaging":
  In Podfile:
    firebase_messaging (from `Flutter/ephemeral/.symlinks/plugins/firebase_messaging/macos`) was resolved to 15.1.0, which depends on
      Firebase/Messaging (~> 11.0.0)

Specs satisfying the `Firebase/Messaging (~> 11.0.0)` dependency were found, but they required a higher minimum deployment target.

This appears to correspond to the following release note:
https://firebase.google.com/support/release-notes/ios#version_1100_-_july_30_2024
saying version 11.0.0 of the Firebase Apple SDK started requiring a minimum deployment target of macOS 10.15.

Naturally we're happy to bump up our minimum macOS deployment target — 10.15 is from 2019, and even increasing to last year's macOS 14 would be perfectly fine. But I spent a few minutes just now attempting to do so — editing the MACOSX_DEPLOYMENT_TARGET = 10.14; lines in the project.pbxproj file so they say 10.15 (or 13.0) instead, then also tried setting it in Xcode which added some new lines of that form — and the error persisted. (Perhaps there's somewhere else that pod update is looking? Perhaps it has a cache of some kind that it fails to update?)

So further debugging is required.

Meanwhile, we'll be holding back firebase_core at 3.3.0 rather than 3.4.0 (and so holding back the other Firebase-related packages too), because that's the upgrade that triggers this.

[sher999]

Log

Update all pods
Updating local specs repositories
Analyzing dependencies
firebase_core: Using Firebase SDK version '11.0.0' defined in 'firebase_core'
firebase_messaging: Using Firebase SDK version '11.0.0' defined in 'firebase_core'
Downloading dependencies
Installing Firebase (11.0.0)
Installing FirebaseCore (11.0.0)
Installing FirebaseCoreInternal (11.6.0)
Installing FirebaseInstallations (11.4.0)
Installing FirebaseMessaging (11.0.0)
Installing FlutterMacOS (1.0.0)
Installing GoogleDataTransport (10.1.0)
Installing GoogleUtilities (8.0.2)
Installing PromisesObjC (2.4.0)
Installing device_info_plus (0.0.1)
Installing file_selector_macos (0.0.1)
Installing firebase_core (3.4.0)
Installing firebase_messaging (15.0.4)
Installing nanopb (3.30910.0)
Installing package_info_plus (0.0.1)
Installing path_provider_foundation (0.0.1)
Installing share_plus (0.0.1)
Installing sqlite3 (3.47.1)
Installing sqlite3_flutter_libs (0.0.1)
Installing url_launcher_macos (0.0.1)
Installing video_player_avfoundation (0.0.1)
Installing wakelock_plus (0.0.1)
Applying patches if necessary
Generating Pods project
Integrating client project
Pod installation complete! There are 12 dependencies from the Podfile and 22 total pods installed.

[!] CocoaPods did not set the base configuration of your project because your project already has a custom config set. In order for CocoaPods integration to work at all, please either set the base configurations of the target `Runner` to `Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig` or include the `Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig` in your build configuration (`Runner/Configs/AppInfo.xcconfig`).

[!] CocoaPods did not set the base configuration of your project because your project already has a custom config set. In order for CocoaPods integration to work at all, please either set the base configurations of the target `Runner` to `Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig` or include the `Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig` in your build configuration (`Runner/Configs/AppInfo.xcconfig`).

[!] CocoaPods did not set the base configuration of your project because your project already has a custom config set. In order for CocoaPods integration to work at all, please either set the base configurations of the target `Runner` to `Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig` or include the `Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig` in your build configuration (`Runner/Configs/AppInfo.xcconfig`).

But I spent a few minutes just now attempting to do so — editing the MACOSX_DEPLOYMENT_TARGET = 10.14; lines in the project.pbxproj

Changes is needed inside the macOS/Podfile line:1 from platform :osx, '10.14' to platform :osx, '10.15'