diff --git a/.github/workflows/build_orca.yml b/.github/workflows/build_orca.yml
index 941e6ed57c..fa53d5916b 100644
--- a/.github/workflows/build_orca.yml
+++ b/.github/workflows/build_orca.yml
@@ -158,14 +158,6 @@ jobs:
         run: |
           ./build_release_macos.sh -u -x ${{ !vars.SELF_HOSTED && '-1' || '' }} -a universal -t 10.15
 
-      - name: Delete intermediate per-arch artifacts
-        if: runner.os == 'macOS' && inputs.macos-combine-only
-        uses: geekyeggo/delete-artifact@v6
-        with:
-          name: |
-            OrcaSlicer_Mac_bundle_arm64_${{ github.sha }}
-            OrcaSlicer_Mac_bundle_x86_64_${{ github.sha }}
-
  # Thanks to RaySajuuk, it's working now
       - name: Sign app and notary
         if: github.repository == 'OrcaSlicer/OrcaSlicer' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release/')) && runner.os == 'macOS' && inputs.macos-combine-only
@@ -176,6 +168,8 @@ jobs:
           KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
           CERTIFICATE_ID: ${{ secrets.MACOS_CERTIFICATE_ID }}
         run: |
+          # Load the `retry` helper (retries flaky commands such as `hdiutil create`).
+          source ${{ github.workspace }}/scripts/retry.sh
           CERTIFICATE_PATH=$RUNNER_TEMP/build_certificate.p12
           KEYCHAIN_PATH=$RUNNER_TEMP/app-signing.keychain-db
           echo -n "$BUILD_CERTIFICATE_BASE64" | base64 --decode --output $CERTIFICATE_PATH
@@ -198,7 +192,7 @@ jobs:
           rm -rf ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/*
           cp -R ${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer.app ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/
           ln -sfn /Applications ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/Applications
-          hdiutil create -volname "OrcaSlicer" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_dmg -ov -format UDZO OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
+          retry hdiutil create -volname "OrcaSlicer" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_dmg -ov -format UDZO OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
           codesign --deep --force --verbose --options runtime --timestamp --entitlements ${{ github.workspace }}/scripts/disable_validation.entitlements --sign "$CERTIFICATE_ID" OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
           
           # Create separate OrcaSlicer_profile_validator DMG if the app exists
@@ -207,7 +201,7 @@ jobs:
             rm -rf ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg/*
             cp -R ${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer_profile_validator.app ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg/
             ln -sfn /Applications ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg/Applications
-            hdiutil create -volname "OrcaSlicer Profile Validator" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg -ov -format UDZO OrcaSlicer_profile_validator_Mac_universal_${{ env.ver }}.dmg
+            retry hdiutil create -volname "OrcaSlicer Profile Validator" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg -ov -format UDZO OrcaSlicer_profile_validator_Mac_universal_${{ env.ver }}.dmg
             codesign --deep --force --verbose --options runtime --timestamp --entitlements ${{ github.workspace }}/scripts/disable_validation.entitlements --sign "$CERTIFICATE_ID" OrcaSlicer_profile_validator_Mac_universal_${{ env.ver }}.dmg
           fi
           
@@ -225,11 +219,13 @@ jobs:
         if: github.ref != 'refs/heads/main' && runner.os == 'macOS' && inputs.macos-combine-only
         working-directory: ${{ github.workspace }}
         run: |
+          # Load the `retry` helper (retries flaky commands such as `hdiutil create`).
+          source ${{ github.workspace }}/scripts/retry.sh
           mkdir -p ${{ github.workspace }}/build/universal/OrcaSlicer_dmg
           rm -rf ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/*
           cp -R ${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer.app ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/
           ln -sfn /Applications ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/Applications
-          hdiutil create -volname "OrcaSlicer" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_dmg -ov -format UDZO OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
+          retry hdiutil create -volname "OrcaSlicer" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_dmg -ov -format UDZO OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
           
           # Create separate OrcaSlicer_profile_validator DMG if the app exists
           if [ -f "${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer_profile_validator.app/Contents/MacOS/OrcaSlicer_profile_validator" ]; then
@@ -237,9 +233,19 @@ jobs:
             rm -rf ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg/*
             cp -R ${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer_profile_validator.app ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg/
             ln -sfn /Applications ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg/Applications
-            hdiutil create -volname "OrcaSlicer Profile Validator" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg -ov -format UDZO OrcaSlicer_profile_validator_Mac_universal_${{ env.ver }}.dmg
+            retry hdiutil create -volname "OrcaSlicer Profile Validator" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg -ov -format UDZO OrcaSlicer_profile_validator_Mac_universal_${{ env.ver }}.dmg
           fi
 
+      # Delete the per-arch bundles only after signing/DMG creation succeeded, so a
+      # failed run keeps them available for a re-run instead of forcing a full rebuild.
+      - name: Delete intermediate per-arch artifacts
+        if: success() && runner.os == 'macOS' && inputs.macos-combine-only
+        uses: geekyeggo/delete-artifact@v6
+        with:
+          name: |
+            OrcaSlicer_Mac_bundle_arm64_${{ github.sha }}
+            OrcaSlicer_Mac_bundle_x86_64_${{ github.sha }}
+
       - name: Upload artifacts mac
         if: runner.os == 'macOS' && inputs.macos-combine-only
         uses: actions/upload-artifact@v7
diff --git a/scripts/retry.sh b/scripts/retry.sh
new file mode 100644
index 0000000000..a41667dac0
--- /dev/null
+++ b/scripts/retry.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+# Sourceable helper: `retry <cmd...>` runs a command, retrying up to 3 times
+# with a 5-minute wait between attempts. Useful for flaky commands such as
+# `hdiutil create` intermittently failing with "Resource busy".
+retry() {
+  local attempt=1 max_attempts=3 delay=300
+  until "$@"; do
+    if [ "$attempt" -ge "$max_attempts" ]; then
+      echo "::error::Command failed after $attempt attempts: $*"
+      return 1
+    fi
+    echo "Attempt $attempt failed: $*. Retrying in $((delay / 60)) minutes..."
+    sleep "$delay"
+    attempt=$((attempt + 1))
+  done
+}