I don't know what kind of format contents uses

azure-pipelines.yml

@@ -36,10 +36,12 @@ jobs:
   - script: |
       cd $(Build.SourcesDirectory)
       ./compileOSX.sh
+      mkdir output
+      cp *.dmg ./output
     displayName: 'Build'
   - task: CopyFiles@2
     inputs:
-      contents: '*.dmg'
+      contents: 'output/**'
       targetFolder: $(Build.ArtifactStagingDirectory)
   - task: PublishBuildArtifacts@1
     inputs: