fix installation using clang-17

.github/workflows/R-CMD-check.yaml

@@ -8,25 +8,21 @@ on:
 
 name: R-CMD-check
 
-concurrency:
-  group: ${{ github.event.pull_request.number || github.run_id }}
-  cancel-in-progress: true
-
 jobs:
   R-CMD-check:
     runs-on: ${{ matrix.config.os }}
 
     name: ${{ matrix.config.os }} (${{ matrix.config.r }})
 
     strategy:
-      fail-fast: true
       matrix:
         config:
           # Rdatatable has full-strength GLCI which runs after merge. So we just need a few
           # jobs (mainly test-coverage) to run on every commit in PRs so as to not slow down dev.
           # GHA does run these jobs concurrently but even so reducing the load seems like a good idea.
           - {os: windows-latest, r: 'devel'}
-          # - {os: macOS-latest, r: 'release'}    # test-coverage.yaml uses macOS
+          - {os: macos-14, r: 'release'}    
+          - {os: macos-15, r: 'release'}    
           # TODO(remotes>2.5.0): Use 24.04[noble?]
           - {os: ubuntu-22.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/jammy/latest"}
           # - {os: ubuntu-22.04,   r: 'devel', rspm: "https://packagemanager.rstudio.com/cran/__linux__/jammy/latest", http-user-agent: "R/4.1.0 (ubuntu-22.04) R (4.1.0 x86_64-pc-linux-gnu x86_64 linux-gnu) on GitHub Actions" }
@@ -68,6 +64,12 @@ jobs:
             eval sudo $cmd
           done < <(Rscript -e 'writeLines(remotes::system_requirements("ubuntu", "22.04"))')
 
+      - name: Install R Package Build Dependencies on MacOS, from https://github.com/stan-dev/cmdstanr/pull/1072/files
+        if: runner.os == 'macOS'
+        uses: r-hub/actions/setup-r-sysreqs@v1
+        with:
+          type: 'minimal'
+
       - name: Install dependencies
         run: |
           remotes::install_deps(dependencies = TRUE)