From 5904529ba16a9c3b13512445a930e15e2d9d176d Mon Sep 17 00:00:00 2001
From: Robert Wallis <SmilingRob@gmail.com>
Date: Sun, 20 Jul 2025 01:04:04 -0700
Subject: [PATCH] macOS: fix runtime crash on macos26 "type code 'q', but found
 'Q'"

Fixes #4299.
---
 Cargo.toml                        | 2 +-
 winit/src/changelog/unreleased.md | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index 20af930c..b4c7d33b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,7 +54,7 @@ ndk = { version = "0.9.0", features = ["rwh_06"], default-features = false }
 # Apple dependencies.
 block2 = "0.6.1"
 dispatch2 = { version = "0.3.0", default-features = false, features = ["std", "objc2"] }
-objc2 = "0.6.1"
+objc2 = { version = "0.6.1", features = ["relax-sign-encoding"] }
 objc2-app-kit = { version = "0.3.1", default-features = false }
 objc2-core-foundation = { version = "0.3.1", default-features = false }
 objc2-core-graphics = { version = "0.3.1", default-features = false }
diff --git a/winit/src/changelog/unreleased.md b/winit/src/changelog/unreleased.md
index e255263d..02f5ed6c 100644
--- a/winit/src/changelog/unreleased.md
+++ b/winit/src/changelog/unreleased.md
@@ -205,6 +205,8 @@ changelog entry.
 - Move `EventLoopExtRunOnDemand` from platform module to `winit::event_loop::run_on_demand`.
 - Use `NamedKey`, `Code` and `Location` from the `keyboard-types` v0.8 crate.
 - Deprecate `Window::set_ime_allowed`, `Window::set_ime_cursor_area`, and `Window::set_ime_purpose`.
+- On macOS, use the objc2 feature `relax-sign-encoding` to fix a runtime crash #4299
+  in macOS 26 with objc type checking.
 
 ### Removed