From fd94dc0cd0afbca1446945522805dd833d45be7f Mon Sep 17 00:00:00 2001
From: Rye <rye@lindenlab.com>
Date: Mon, 10 Feb 2025 14:10:47 -0500
Subject: Disable old GPU hacks on macos when running against Apple GPU

---
 indra/llrender/llglslshader.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'indra/llrender/llglslshader.cpp')

diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index 0841c0e943..66f38c9281 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -421,8 +421,11 @@ bool LLGLSLShader::createShader()
     llassert_always(!mShaderFiles.empty());
 
 #if LL_DARWIN
-    // work-around missing mix(vec3,vec3,bvec3)
-    mDefines["OLD_SELECT"] = "1";
+    if(!gGLManager.mIsApple)
+    {
+        // work-around missing mix(vec3,vec3,bvec3)
+        mDefines["OLD_SELECT"] = "1";
+    }
 #endif
 
     mShaderHash = hash();
-- 
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