From 805f5801fac664f765c25cb6bc826d2f5b769327 Mon Sep 17 00:00:00 2001
From: Robert Connell <robert_connell@apple.com>
Date: Sat, 26 Jul 2025 09:34:47 -0400
Subject: [PATCH] =?UTF-8?q?Cannot=20use=20Metal=20properly=20with=20Swift?=
 =?UTF-8?q?=20Packages=20=E2=80=94=20even=20with=20Apple-recommended=20plu?=
 =?UTF-8?q?gin=20workaround?=
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---
 Sources/Basics/Sandbox.swift | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sources/Basics/Sandbox.swift b/Sources/Basics/Sandbox.swift
index 01c021f664f..f24636cac13 100644
--- a/Sources/Basics/Sandbox.swift
+++ b/Sources/Basics/Sandbox.swift
@@ -133,6 +133,9 @@ fileprivate func macOSSandboxProfile(
     // This is needed to use the UniformTypeIdentifiers API.
     contents += "(allow mach-lookup (global-name \"com.apple.lsd.mapdb\"))\n"
 
+    // For downloadable Metal toolchain lookups.
+    contents += "(allow mach-lookup (global-name \"com.apple.mobileassetd.v2\"))\n"
+
     if allowNetworkConnections.filter({ $0 != .none }).isEmpty == false {
         // this is used by the system for caching purposes and will lead to log spew if not allowed
         contents += "(allow file-write* (regex \"/Users/*/Library/Caches/*/Cache.db*\"))"