diff --git a/scripts/create-dmg.sh b/scripts/create-dmg.sh
index db8d819a27e3..7393f3a4c382 100755
--- a/scripts/create-dmg.sh
+++ b/scripts/create-dmg.sh
@@ -91,6 +91,23 @@ cleanup_dmg() {
 }
 trap cleanup_dmg EXIT
 
+detach_dmg() {
+  local attempt
+  for attempt in {1..15}; do
+    if hdiutil detach "$MOUNT_POINT" -quiet 2>/dev/null; then
+      MOUNTED=0
+      return
+    fi
+    if (( attempt >= 3 )) && hdiutil detach "$MOUNT_POINT" -force 2>/dev/null; then
+      MOUNTED=0
+      return
+    fi
+    # Finder can retain the just-closed volume briefly on macOS runners.
+    sleep 2
+  done
+  return 1
+}
+
 mkdir -p "$DMG_SOURCE" "$MOUNT_POINT"
 cp -R "$APP_PATH" "$DMG_SOURCE/"
 ln -s /Applications "$DMG_SOURCE/Applications"
@@ -161,20 +178,7 @@ end tell
 EOF
 fi
 
-for i in {1..5}; do
-  if hdiutil detach "$MOUNT_POINT" -quiet 2>/dev/null; then
-    MOUNTED=0
-    break
-  fi
-  if [[ "$i" == "3" ]]; then
-    if hdiutil detach "$MOUNT_POINT" -force 2>/dev/null; then
-      MOUNTED=0
-      break
-    fi
-  fi
-  sleep 2
-done
-if [[ "$MOUNTED" == "1" ]]; then
+if ! detach_dmg; then
   echo "Error: Failed to detach DMG mount: $MOUNT_POINT" >&2
   exit 1
 fi
diff --git a/test/scripts/create-dmg.test.ts b/test/scripts/create-dmg.test.ts
index 8bbabc31288d..d35e6d5aba8f 100644
--- a/test/scripts/create-dmg.test.ts
+++ b/test/scripts/create-dmg.test.ts
@@ -88,6 +88,16 @@ case "$command_name" in
     if [[ "\${HDIUTIL_DETACH_FAIL:-0}" == "1" ]]; then
       exit 9
     fi
+    detach_attempts_file="\${HDIUTIL_LOG}.detach-attempts"
+    detach_attempts=0
+    if [[ -f "$detach_attempts_file" ]]; then
+      detach_attempts="$(cat "$detach_attempts_file")"
+    fi
+    detach_attempts=$((detach_attempts + 1))
+    printf '%s' "$detach_attempts" > "$detach_attempts_file"
+    if (( detach_attempts <= \${HDIUTIL_DETACH_FAIL_COUNT:-0} )); then
+      exit 9
+    fi
     ;;
   resize)
     if [[ "\${1:-}" == "-limits" ]]; then
@@ -300,6 +310,28 @@ describe.runIf(process.platform === "darwin")("create-dmg ownership boundaries",
     rmSync(path.dirname(mountPoint as string), { recursive: true, force: true });
   });
 
+  it("retries a delayed DMG detach before finalizing the artifact", () => {
+    const app = makeValidApp();
+    const outputDir = mkdtempSync(path.join(tmpdir(), "openclaw-create-dmg-output-"));
+    tempDirs.push(outputDir);
+    const output = path.join(outputDir, "OpenClaw.dmg");
+    const tools = makeFakeDmgTools();
+
+    const result = runScript([app, output], {
+      ...tools.env,
+      HDIUTIL_DETACH_FAIL_COUNT: "6",
+    });
+
+    expect(result.status).toBe(0);
+    expect(readFileSync(output, "utf8")).toBe("converted");
+    const log = readFileSync(tools.hdiutilLog, "utf8");
+    expect(log.match(/^detach /gm)).toHaveLength(7);
+    expect(log).toContain("detach ");
+    expect(log).toContain("-force");
+    expect(log).toContain("resize");
+    expect(log).toContain("convert ");
+  });
+
   it("styles the private mount without closing unrelated Finder windows", () => {
     const app = makeValidApp();
     const outputDir = mkdtempSync(path.join(tmpdir(), "openclaw-create-dmg-output-"));