diff --git a/eng/platform-matrix.yml b/eng/platform-matrix.yml
index 03fcd580fe0a..dc375d1fe8a5 100644
--- a/eng/platform-matrix.yml
+++ b/eng/platform-matrix.yml
@@ -92,8 +92,9 @@ jobs:
     archType: x64
     osGroup: OSX
     osIdentifier: OSX
-    helixQueuesPublic: 'OSX.1012.Amd64.Open,OSX.1013.Amd64.Open'
-    helixQueuesInternal: 'OSX.1012.Amd64,OSX.1013.Amd64'
+    # TODO: add OSX.1012.Amd64.Open and OSX.1012.Amd64 when https://github.com/dotnet/core-eng/issues/4856 is resolved
+    helixQueuesPublic: 'OSX.1013.Amd64.Open'
+    helixQueuesInternal: 'OSX.1013.Amd64'
     ${{ insert }}: ${{ parameters.jobParameters }}
 
 # Windows x64/x86/arm/arm64