MacOS x86_64 installer fix 🙏🏾 (#3333)

- Forced Gradle to build MacOS `x86_64` distribution with `x86_64`
architecture in workflows
- Corrected pathing for signed artefacts

![Screenshot 2025-04-11 at 12 31
48](https://github.com/user-attachments/assets/04741c41-0f2c-4ccd-9e36-50aa351d414c)

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [x] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [x] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [x] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [x] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

build.gradle

@@ -164,14 +164,12 @@ jpackage {
         appVersion = getMacVersion(project.version.toString())
         icon = "src/main/resources/static/favicon.icns"
         type = "dmg"
-        macPackageIdentifier = "com.stirling.software.pdf"
-        macPackageName = "Stirling-PDF-aarch64"
+        macPackageIdentifier = "Stirling-PDF"
+        macPackageName = "Stirling-PDF"
         macAppCategory = "public.app-category.productivity"
         macSign = false // Enable signing
         macAppStore = false // Not targeting App Store initially
-//
-//        //installDir = "Applications"
-//
+
 //        // Add license and other documentation to DMG
 //        /*macDmgContent = [
 //            "README.md",
@@ -252,16 +250,16 @@ tasks.register('jpackageMacX64') {
         def result = exec {
             commandLine 'jpackage',
                     '--type', 'dmg',
-                    '--name', 'Stirling-PDF-x86_64',
+                    '--name', 'Stirling-PDF (x86_64)',
                     '--input', 'build/libs',
                     '--main-jar', "Stirling-PDF-${project.version}.jar",
-                    '--main-class', 'stirling.software.SPDF.SPDFApplication',
+                    '--main-class', 'org.springframework.boot.loader.launch.JarLauncher',
                     '--runtime-image', file(jrePath + "/zulu-17.jre/Contents/Home"),
-                    '--dest', 'build/jpackage',
+                    '--dest', 'build/jpackage/x86_64',
                     '--icon', 'src/main/resources/static/favicon.icns',
                     '--app-version', getMacVersion(project.version.toString()),
-                    '--mac-package-name', 'Stirling-PDF',
-                    '--mac-package-identifier', 'com.stirling.software.pdf',
+                    '--mac-package-name', 'Stirling-PDF (x86_64)',
+                    '--mac-package-identifier', 'Stirling-PDF (x86_64)',
                     '--mac-app-category', 'public.app-category.productivity'
             standardOutput = outputStream
             errorOutput = errorStream
@@ -281,7 +279,7 @@ tasks.register('jpackageMacX64') {
     }
 }
 
-jpackage.finalizedBy(jpackageMacX64)
+//jpackage.finalizedBy(jpackageMacX64)
 
 tasks.register('downloadTempJre') {
     group = 'distribution'