diff --git a/.github/workflows/bootstrap.yml b/.github/workflows/bootstrap.yml
index b7cfd34c44a..56970448239 100644
--- a/.github/workflows/bootstrap.yml
+++ b/.github/workflows/bootstrap.yml
@@ -52,28 +52,18 @@ jobs:
           restore-keys: bootstrap-${{ runner.os }}-${{ matrix.ghc }}-20221115-
 
       - uses: actions/checkout@v4
-      # See https://github.com/haskell/cabal/pull/8739
-      - name: Sudo chmod to permit ghcup to update its cache
-        run: |
-          if [[ "${{ runner.os }}" == "Linux" ]]; then
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo mkdir -p /usr/local/.ghcup/cache
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo chown -R $USER /usr/local/.ghcup
-            sudo chmod -R 777 /usr/local/.ghcup
-          fi
+      - uses: haskell-actions/setup@v2
+        with:
+          ghc-version: ${{ matrix.ghc }}
+
       - name: bootstrap.py
         run: |
           GHC_VERSION=${{ matrix.ghc }}
-          ghcup --version
-          ghcup config set cache true
-          ghcup install ghc $GHC_VERSION
-
           # Fetch the bootstrap sources (we use linux dependencies also on macos)
-          python3 bootstrap/bootstrap.py -w $(ghcup whereis ghc $GHC_VERSION) -d bootstrap/linux-$GHC_VERSION.json fetch
+          python3 bootstrap/bootstrap.py -d bootstrap/linux-$GHC_VERSION.json fetch
 
           # Bootstrap using the bootstrap sources
-          python3 bootstrap/bootstrap.py -w $(ghcup whereis ghc $GHC_VERSION) --bootstrap-sources bootstrap-sources.tar.gz
+          python3 bootstrap/bootstrap.py --bootstrap-sources bootstrap-sources.tar.gz
 
       - name: Smoke test
         run: |
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 2b2e2a6b050..26f09d8c7c1 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -66,7 +66,7 @@ jobs:
       GHC_FOR_RELEASE: ${{ format('["{0}"]', env.GHC_FOR_RELEASE) }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-13, windows-latest]
         # If you remove something from here.. then add it to the old-ghcs job.
         ghc: ['9.8.2', '9.6.4', '9.4.8', '9.2.8', '9.0.2', '8.10.7', '8.8.4', '8.6.5']
         exclude:
diff --git a/cabal-testsuite/PackageTests/Manpage/cabal.test.hs b/cabal-testsuite/PackageTests/Manpage/cabal.test.hs
index 6b19fa4d7ce..68def219070 100644
--- a/cabal-testsuite/PackageTests/Manpage/cabal.test.hs
+++ b/cabal-testsuite/PackageTests/Manpage/cabal.test.hs
@@ -7,8 +7,8 @@ main = cabalTest $ do
     assertOutputContains ".B cabal install" r
     assertOutputDoesNotContain ".B cabal manpage" r
 
-    -- The following test of `cabal man` needs `nroff` which is not available under Windows.
-    unless (buildOS == Windows) $ do
+    -- The following test of `cabal man` needs `nroff` which is not available under Windows and OSX.
+    unless (buildOS == Windows || buildOS ==OSX) $ do
 
       -- Check that output of `cabal man --raw` can be passed through `nroff -man`
       -- without producing any warnings (which are printed to stderr).