fix(bundler): Don't self-sign dmg (#12323)

Author: FabianLars

.changes/dmg-no-selfsign.md

@@ -0,0 +1,5 @@
+---
+tauri-bundler: 'patch:bug'
+---
+
+Skip signing the .dmg if self signing via `"signingIdentity": "-"` is used.

crates/tauri-bundler/src/bundle/macos/dmg/mod.rs

@@ -194,16 +194,19 @@ pub fn bundle_project(settings: &Settings, bundles: &[Bundle]) -> crate::Result<
   fs::rename(bundle_dir.join(dmg_name), dmg_path.clone())?;
 
   // Sign DMG if needed
-
-  if let Some(keychain) = super::sign::keychain(settings.macos().signing_identity.as_deref())? {
-    super::sign::sign(
-      &keychain,
-      vec![super::sign::SignTarget {
-        path: dmg_path.clone(),
-        is_an_executable: false,
-      }],
-      settings,
-    )?;
+  // skipping self-signing DMGs https://github.com/tauri-apps/tauri/issues/12288
+  let identity = settings.macos().signing_identity.as_deref();
+  if identity != Some("-") {
+    if let Some(keychain) = super::sign::keychain(identity)? {
+      super::sign::sign(
+        &keychain,
+        vec![super::sign::SignTarget {
+          path: dmg_path.clone(),
+          is_an_executable: false,
+        }],
+        settings,
+      )?;
+    }
   }
 
   Ok(Bundled {