diff --git a/src/main.test.ts b/src/main.test.ts
index 01cace0..11ea80d 100644
--- a/src/main.test.ts
+++ b/src/main.test.ts
@@ -9,7 +9,10 @@ vi.mock("obsidian", () => ({
   Platform: {
     isAndroidApp: false,
     isIosApp: false,
+    isLinux: false,
+    isMacOS: true,
     isTablet: false,
+    isWin: false,
   },
   Plugin: class {},
   PluginSettingTab: class {},
@@ -194,7 +197,7 @@ describe("device identity settings", () => {
 
     await plugin.updateSettings({ deviceName: "" });
 
-    expect(plugin.settings.deviceName).toBe("Desktop KS5A");
+    expect(plugin.settings.deviceName).toBe("Mac Desktop KS5A");
     expect(plugin.saveSettings).toHaveBeenCalledTimes(1);
   });
 });
diff --git a/src/main.ts b/src/main.ts
index 1761345..fe9836a 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -378,6 +378,18 @@ function getCurrentDeviceName(deviceId: string): string {
     return `${Platform.isTablet ? "Android Tablet" : "Android Phone"} ${suffix}`;
   }
 
+  if (Platform.isMacOS) {
+    return `Mac Desktop ${suffix}`;
+  }
+
+  if (Platform.isWin) {
+    return `Windows Desktop ${suffix}`;
+  }
+
+  if (Platform.isLinux) {
+    return `Linux Desktop ${suffix}`;
+  }
+
   return `Desktop ${suffix}`;
 }