Index: .github/workflows/build.yml
===================================================================
diff -u -r1b5265205ba0b199463e6d0875d8acd0aa29459e -r8515b3d2517e73051463dec485c70989b4830868
--- .github/workflows/build.yml	(.../build.yml)	(revision 1b5265205ba0b199463e6d0875d8acd0aa29459e)
+++ .github/workflows/build.yml	(.../build.yml)	(revision 8515b3d2517e73051463dec485c70989b4830868)
@@ -21,6 +21,14 @@
             compiler: clang
             tcltag: core-8-6-branch
             experimental: [true]
+          - os: macos-latest
+            compiler: gcc
+            tcltag: trunk
+            experimental: [true]
+          - os: macos-latest
+            compiler: clang
+            tcltag: core-8-6-branch
+            experimental: [true]
           - os: ubuntu-latest
             compiler: gcc-10
             tcltag: trunk