From 3c99c05460738cfe089b15839984f9d09112bd86 Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Tue, 30 Jul 2019 11:31:28 +0000
Subject: Handle Mac buttons 6-9 in one place more.

---
 macosx/tkMacOSXMouseEvent.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/macosx/tkMacOSXMouseEvent.c b/macosx/tkMacOSXMouseEvent.c
index 0221a0e..4fc5fe4 100644
--- a/macosx/tkMacOSXMouseEvent.c
+++ b/macosx/tkMacOSXMouseEvent.c
@@ -185,8 +185,10 @@ enum {
 	    typeUInt32, NULL, sizeof(UInt32), NULL, &buttons);
 
     if (err == noErr) {
-	state |= (buttons & 0x1F) * Button1Mask;
-    } else if (button <= Button5) {
+	state |= (buttons & 0x7F) * Button1Mask;
+	/* Handle buttons 8/9 */
+	state |= (buttons & 0x180) * (Button8Mask >> 7);
+    } else if (button <= Button9) {
 	switch (eventType) {
 	case NSLeftMouseDown:
 	case NSRightMouseDown:
-- 
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