From 9c4edf56ca83ece87979d2fd3ba9aaacc9b320fc Mon Sep 17 00:00:00 2001
From: Ben Doherty <bendoherty@google.com>
Date: Tue, 16 Dec 2025 10:41:14 -0800
Subject: [PATCH] Metal: fix compiler crash when running iOS apps under Mac
 Catalyst (#9524)

---
 filament/backend/src/metal/MetalShaderCompiler.mm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/filament/backend/src/metal/MetalShaderCompiler.mm b/filament/backend/src/metal/MetalShaderCompiler.mm
index 71dcd24ca9..b53b809b41 100644
--- a/filament/backend/src/metal/MetalShaderCompiler.mm
+++ b/filament/backend/src/metal/MetalShaderCompiler.mm
@@ -120,6 +120,12 @@ bool MetalShaderCompiler::isParallelShaderCompileSupported() const noexcept {
                 // explicitly set the minimum version we require.
                 #if defined(FILAMENT_IOS)
                     options.languageVersion = MTLLanguageVersion2_0;
+                    // Mac Catalyst requires at least MSL 2.2.
+                    if (@available(iOS 13.0, *)) {
+                        if (UTILS_UNLIKELY([NSProcessInfo processInfo].isMacCatalystApp)) {
+                            options.languageVersion = MTLLanguageVersion2_2;
+                        }
+                    }
                 #else
                     if (@available(macOS 11.0, *)) {
                         options.languageVersion = MTLLanguageVersion2_3;