fix: isolate macOS native capture by platform

electron-builder.json5

@@ -46,6 +46,13 @@
     ],
     "icon": "icons/icons/mac/icon.icns",
     "artifactName": "${productName}-Mac-${arch}-${version}-Installer.${ext}",
+    "extraResources": [
+      {
+        "from": "electron/native/bin",
+        "to": "electron/native/bin",
+        "filter": ["darwin-*/*"]
+      }
+    ],
     "extendInfo": {
       "NSAudioCaptureUsageDescription": "OpenScreen needs audio capture permission to record system audio.",
       "NSMicrophoneUsageDescription": "OpenScreen needs microphone access to record voice audio.",
@@ -73,7 +80,7 @@
       {
         "from": "electron/native/bin",
         "to": "electron/native/bin",
-        "filter": ["**/*"]
+        "filter": ["win32-*/*"]
       }
     ]
   },

electron/ipc/handlers.ts

@@ -1759,6 +1759,10 @@ export function registerIpcHandlers(
 	});
 
 	ipcMain.handle("pause-native-mac-recording", async () => {
+		if (process.platform !== "darwin") {
+			return { success: false, error: "Native macOS capture requires macOS." };
+		}
+
 		const proc = nativeMacCaptureProcess;
 		if (!proc) {
 			return { success: false, error: "Native macOS capture is not running." };
@@ -1781,6 +1785,10 @@ export function registerIpcHandlers(
 	});
 
 	ipcMain.handle("resume-native-mac-recording", async () => {
+		if (process.platform !== "darwin") {
+			return { success: false, error: "Native macOS capture requires macOS." };
+		}
+
 		const proc = nativeMacCaptureProcess;
 		if (!proc) {
 			return { success: false, error: "Native macOS capture is not running." };
@@ -1887,6 +1895,10 @@ export function registerIpcHandlers(
 	});
 
 	ipcMain.handle("stop-native-mac-recording", async (_, discard?: boolean) => {
+		if (process.platform !== "darwin") {
+			return { success: false, error: "Native macOS capture requires macOS." };
+		}
+
 		const proc = nativeMacCaptureProcess;
 		const preferredPath = nativeMacCaptureTargetPath;
 		const recordingId = nativeMacCaptureRecordingId ?? Date.now();
@@ -1971,6 +1983,10 @@ export function registerIpcHandlers(
 		"attach-native-mac-webcam-recording",
 		async (_, payload: AttachNativeMacWebcamRecordingInput) => {
 			try {
+				if (process.platform !== "darwin") {
+					return { success: false, error: "Native macOS webcam attachment requires macOS." };
+				}
+
 				const screenVideoPath = normalizeVideoSourcePath(payload.screenVideoPath);
 				if (!screenVideoPath || !isPathWithinDir(screenVideoPath, RECORDINGS_DIR)) {
 					return {