diff --git a/crates/tauri-app/src-tauri/tauri.conf.json b/crates/tauri-app/src-tauri/tauri.conf.json
index ebef902..98c2c19 100644
--- a/crates/tauri-app/src-tauri/tauri.conf.json
+++ b/crates/tauri-app/src-tauri/tauri.conf.json
@@ -5,7 +5,7 @@
   "identifier": "de.eifelcloud.maarcadetweet",
   "build": {
     "beforeDevCommand": "npm run dev",
-    "devUrl": "http://localhost:1430",
+    "devUrl": "http://127.0.0.1:1430",
     "beforeBuildCommand": "npm run build",
     "frontendDist": "../dist"
   },
diff --git a/crates/tauri-app/vite.config.ts b/crates/tauri-app/vite.config.ts
index 3d2c1c7..c4d6b95 100644
--- a/crates/tauri-app/vite.config.ts
+++ b/crates/tauri-app/vite.config.ts
@@ -17,7 +17,16 @@ export default defineConfig(async () => ({
   server: {
     port: 1430,
     strictPort: true,
-    host: host || false,
+    // Always bind to IPv4 127.0.0.1 explicitly. `host || false` lets
+    // vite pick "localhost" which on macOS resolves to both v4 and v6
+    // and binds to v6 by default — the Tauri webview then tries v4
+    // first and gets a connection refused. The explicit v4 address
+    // matches `tauri.conf.json`'s `devUrl` so the webview connects
+    // reliably. HMR via Tauri (cross-platform) still works because
+    // vite binds both v4 and v6 in modern versions when the address
+    // is the v4 loopback; if that breaks for someone we can use
+    // `0.0.0.0` to listen on all interfaces instead.
+    host: host || "127.0.0.1",
     hmr: host
       ? { protocol: "ws", host, port: 1431 }
       : undefined,