chore: Remove Carthage supporte from ReadMe (#6926)

* chore: Remove Carthage supporte from ReadMe

* Add decision to Decisions.md

* Add the fact that no user complained about Carthage

Author: itaybre

README.md

@@ -16,7 +16,6 @@ _Bad software is everywhere, and we're tired of it. Sentry is on a mission to he
 [![Build](https://img.shields.io/github/actions/workflow/status/getsentry/sentry-cocoa/build.yml?branch=main)](https://github.com/getsentry/sentry-cocoa/actions/workflows/build.yml?query=branch%3Amain)
 [![codecov.io](https://codecov.io/gh/getsentry/sentry-cocoa/branch/master/graph/badge.svg)](https://codecov.io/gh/getsentry/sentry-cocoa)
 [![CocoaPods compatible](https://img.shields.io/cocoapods/v/Sentry.svg)](https://cocoapods.org/pods/Sentry)
-[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 [![SwiftPM compatible](https://img.shields.io/badge/spm-compatible-brightgreen.svg?style=flat)](https://swift.org/package-manager)
 ![platforms](https://img.shields.io/cocoapods/p/Sentry.svg?style=flat)
 [![Swift Package Index](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fgetsentry%2Fsentry-cocoa%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/getsentry/sentry-cocoa)
@@ -25,7 +24,7 @@ _Bad software is everywhere, and we're tired of it. Sentry is on a mission to he
 
 # Installation
 
-SPM is the recommended way to include Sentry into your project, but we also support [CocoaPods](https://cocoapods.org/pods/Sentry) and Carthage, and provide pre-built XCFrameworks on [our GitHub Releases page](https://github.com/getsentry/sentry-cocoa/releases).
+SPM is the recommended way to include Sentry into your project, but we also support [CocoaPods](https://cocoapods.org/pods/Sentry), and provide pre-built XCFrameworks on [our GitHub Releases page](https://github.com/getsentry/sentry-cocoa/releases).
 
 # Initialization
 

develop-docs/DECISIONS.md

@@ -479,3 +479,15 @@ Related links:
 
 - https://github.com/getsentry/sentry-cocoa/issues/6758
 - https://github.com/getsentry/sentry-cocoa/pull/6873
+
+## Deprecate Carthage Support
+
+Date: November 28, 2025
+Contributors: @philprime, @philipphofmann, @itaybre
+
+We have found that Carthage does not support downloading multiple XCFrameworks from GitHub Releases, nor does there appear to be an easy workaround for this limitation. This wasn't a recent change, but by design (see the related PR), so Carthage was broken for some time without any user complaints, giving us confidence that very few people use Carthage for integrating with Sentry.
+We also decided to streamline our integrations by reducing the number of package managers that build from source. Therefore, we have decided to deprecate all official Carthage support with v9. Users may still be able to use Carthage, but it will no longer be recommended or officially supported.
+
+Related:
+
+- Fix for multiple files in Releases (stale for months): https://github.com/Carthage/Carthage/pull/3398