diff --git a/macos/InputHandler.mm b/macos/InputHandler.mm
index e4f8901..ddcbbc8 100644
--- a/macos/InputHandler.mm
+++ b/macos/InputHandler.mm
@@ -217,9 +217,9 @@ void InputHandler::handleMouseWheel(int delta)
 {
     // Convert Windows wheel delta (120 = one notch) to macOS pixel units
     // Using pixel units provides smoother scrolling than line units
-    // Windows: 120 = one standard notch
-    // macOS: approximately 10 pixels per notch feels natural
-    int32_t scrollAmount = (delta * 10) / 120;
+    // Windows: 120 = one standard notch (~3 lines * 20px = ~60px)
+    // macOS: 40 pixels per notch matches Windows scroll feel
+    int32_t scrollAmount = (delta * 40) / 120;
 
     // Use pixel units for smoother scrolling experience
     CGEventRef event = CGEventCreateScrollWheelEvent(
diff --git a/server/2015Remote/WebService.cpp b/server/2015Remote/WebService.cpp
index 091ffee..5b4a92c 100644
--- a/server/2015Remote/WebService.cpp
+++ b/server/2015Remote/WebService.cpp
@@ -1600,6 +1600,9 @@ std::string CWebService::BuildDeviceListJson(const std::string& username) {
                 device["screen"] = AnsiToUtf8(resolution);  // e.g. "2:3840x1080"
             }
 
+            CString clientType = ctx->GetAdditionalData(RES_CLIENT_TYPE);
+            device["clientType"] = AnsiToUtf8(clientType);  // e.g. "MAC", "LNX", "EXE"
+
             res["devices"].append(device);
         }
         LeaveCriticalSection(&m_pParentDlg->m_cs);
diff --git a/server/web/index.html b/server/web/index.html
index d63e7f0..545352e 100644
--- a/server/web/index.html
+++ b/server/web/index.html
@@ -3667,13 +3667,15 @@
                 // Must send first click before dblclick for Windows to recognize
                 console.log('[Touch] Double click');
                 clickAtCursor(0);  // First click
-                // dblClickAtCursor();  // Then double click
-                // 强制人工延迟 20 毫秒发送第二次标准单击
-                // 这 20ms 的延迟在操作上完全感觉不到，但对远程桌面的网络和操作系统驱动至关重要！
-                // 它能完美地把两次点击在时间线上拉开，让任何操作系统都 100% 判定这是标准的“物理鼠标双击”。
-                setTimeout(() => {
-                    clickAtCursor(0);
-                }, 20);
+                if (currentDevice && currentDevice.clientType === 'MAC') {
+                    // macOS uses a real dblclick event; two sequential clicks don't work
+                    dblClickAtCursor();  // Then double click
+                } else {
+                    // Windows/Linux: simulate physical double-click with two clicks 20ms apart
+                    setTimeout(() => {
+                        clickAtCursor(0);
+                    }, 20);
+                }
                 touchState.state = T_IDLE;
             } else if (touchState.state === T_FIRST_DOWN && !touchState.moved) {
                 // First tap released without moving = single click