diff --git a/.github/workflows/r_package.yml b/.github/workflows/r_package.yml
index c72ec7fae112..71a505ae9c0a 100644
--- a/.github/workflows/r_package.yml
+++ b/.github/workflows/r_package.yml
@@ -51,12 +51,6 @@ jobs:
             r_version: 4.3
             build_type: cmake
             container: 'ubuntu:22.04'
-          - os: ubuntu-latest
-            task: r-package
-            compiler: clang
-            r_version: 3.6
-            build_type: cmake
-            container: 'ubuntu:18.04'
           - os: ubuntu-latest
             task: r-package
             compiler: clang
@@ -134,6 +128,13 @@ jobs:
             r_version: 4.3
             build_type: cran
             container: null
+          # macos-14 = arm64
+          - os: macos-14
+            task: r-package
+            compiler: clang
+            r_version: 4.3
+            build_type: cran
+            container: null
     steps:
       - name: Prevent conversion of line endings on Windows
         if: startsWith(matrix.os, 'windows')