From bc238a245f447fc31f7348d934f9928b4f6bdaaa Mon Sep 17 00:00:00 2001
From: Daniel <845765@qq.com>
Date: Fri, 19 Dec 2025 20:13:57 +0800
Subject: [PATCH] :bug: Fix Built-in Pandoc is not working on Unix-like Fix
 https://github.com/siyuan-note/siyuan/issues/16623

Signed-off-by: Daniel <845765@qq.com>
---
 kernel/util/pandoc.go | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/kernel/util/pandoc.go b/kernel/util/pandoc.go
index 300fe5499..2d9053789 100644
--- a/kernel/util/pandoc.go
+++ b/kernel/util/pandoc.go
@@ -239,17 +239,20 @@ func IsValidPandocBin(binPath string) bool {
 	}
 
 	isBin := false
-	// 常见二进制魔数：ELF, PE("MZ"), Mach-O/FAT
+	// 常见二进制魔数：ELF, PE("MZ"), Mach-O (32/64, big/little), FAT
 	if len(header) >= 4 {
 		switch {
 		case bytes.Equal(header[:4], []byte{0x7f, 'E', 'L', 'F'}):
 			isBin = true // ELF
-		case bytes.Equal(header[:4], []byte{0xfe, 0xed, 0xfa, 0xce}):
-			isBin = true // Mach-O
-		case bytes.Equal(header[:4], []byte{0xce, 0xfa, 0xed, 0xfe}):
-			isBin = true // Mach-O (swapped)
-		case bytes.Equal(header[:4], []byte{0xca, 0xfe, 0xba, 0xbe}):
-			isBin = true // FAT
+		// Mach-O / Mach-O swapped (32-bit)
+		case bytes.Equal(header[:4], []byte{0xfe, 0xed, 0xfa, 0xce}), bytes.Equal(header[:4], []byte{0xce, 0xfa, 0xed, 0xfe}):
+			isBin = true
+		// Mach-O 64-bit / swapped
+		case bytes.Equal(header[:4], []byte{0xfe, 0xed, 0xfa, 0xcf}), bytes.Equal(header[:4], []byte{0xcf, 0xfa, 0xed, 0xfe}):
+			isBin = true
+		// FAT / FAT swapped
+		case bytes.Equal(header[:4], []byte{0xca, 0xfe, 0xba, 0xbe}), bytes.Equal(header[:4], []byte{0xbe, 0xba, 0xfe, 0xca}):
+			isBin = true
 		}
 	}
 	// PE only needs first 2 bytes "MZ"