--- a/libhb/platform/macosx/encca_aac.c	2026-06-07 21:36:41.000000000 +0800
+++ b/libhb/platform/macosx/encca_aac.c	2026-08-22 12:02:44.000000000 +0800
@@ -143,7 +143,6 @@
     { AV_CHANNEL_LAYOUT_6POINT1,           kAudioChannelLayoutTag_AAC_6_1 },
     { AV_CHANNEL_LAYOUT_7POINT0,           kAudioChannelLayoutTag_AAC_7_0 },
     { AV_CHANNEL_LAYOUT_7POINT1_WIDE,      kAudioChannelLayoutTag_AAC_7_1 },
-    { AV_CHANNEL_LAYOUT_7POINT1,           kAudioChannelLayoutTag_AAC_7_1_B },
 };
 static int aac_channel_layout_map_count = sizeof(aac_channel_layout_map) / sizeof(aac_channel_layout_map[0]);