Only macos-13 for intel

Author: stewartboogert

.github/workflows/main.yaml

@@ -19,7 +19,8 @@ jobs:
       fail-fast: false
       matrix:
         root-version: ["v6-30-04", "v6-32-10", "v6-34-04"]
-        os: [macOS-13, macOS-14, macOS-15]
+#        os: [macOS-13, macOS-14, macOS-15]
+        os: [macOS-13]
 
     steps:
       - uses: actions/checkout@v4       

README.md

@@ -4,7 +4,7 @@ Hack for rootcint for conda build for macosx_arm64
 
 ## Builds 
  * root (v6-30-04, v6-32-10, v6-34-04)
- * Apple and Intel silicon (macOS-13, macOS-14, macOS-15)
+ * Intel silicon (macOS-13)
 
 ## Usage
  * Update `.github/workflows/main.yaml`