diff --git a/xcode/common.xcconfig b/xcode/common.xcconfig
index 8f81a5b3b8..3878c2d51f 100644
--- a/xcode/common.xcconfig
+++ b/xcode/common.xcconfig
@@ -71,6 +71,9 @@ ENABLE_STRICT_OBJC_MSGSEND = YES
 GCC_C_LANGUAGE_STANDARD = c11
 GCC_NO_COMMON_BLOCKS = YES
 GCC_PRECOMPILE_PREFIX_HEADER = YES
+// Preprocessor definitions shared in all configurations and projects.
+// Silence "Migrate from OpenGL to Metal" warnings.
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COREVIDEO_SILENCE_GL_DEPRECATION GLES_SILENCE_DEPRECATION
 ONLY_ACTIVE_ARCH = YES
 PRODUCT_NAME = $(TARGET_NAME)
 SKIP_INSTALL = YES