diff --git a/.github/workflows/mac_arm_build.yml b/.github/workflows/mac_arm_build.yml
index c0923b252b..94afd1a7fe 100644
--- a/.github/workflows/mac_arm_build.yml
+++ b/.github/workflows/mac_arm_build.yml
@@ -43,7 +43,6 @@ jobs:
           python3.10 -m pip install lief dmgbuild
           patch --ignore-whitespace -d /opt/homebrew/lib/python3.10/site-packages/dmgbuild -N -p0 < ./utils/build/macos/dmgbuild.patch
       - uses: actions/checkout@v4
-      - run: ${PWD}/utils/set_up_macos.sh
       - name: Fetch Plato prerequisites
         uses: ./utils/ci/consolidated_cache
         with:
diff --git a/.github/workflows/mac_intel_build.yml b/.github/workflows/mac_intel_build.yml
index e031cbcb02..89ec7b7ec6 100644
--- a/.github/workflows/mac_intel_build.yml
+++ b/.github/workflows/mac_intel_build.yml
@@ -48,7 +48,6 @@ jobs:
           patch --ignore-whitespace -d /usr/local/lib/python3.10/site-packages/dmgbuild -N -p0 < ./utils/build/macos/dmgbuild.patch
       # Temporarily force this to succeed. The container's Python conflicts with homebrew's,
       # but we don't really use it anyway.
-      - run: ${PWD}/utils/set_up_macos.sh || true
       - name: Fetch Plato prerequisites
         uses: ./utils/ci/consolidated_cache
         with:
diff --git a/utils/Brewfile b/utils/Brewfile
index 2a3dd05840..623148e143 100644
--- a/utils/Brewfile
+++ b/utils/Brewfile
@@ -1,13 +1,3 @@
 # vim: syntax=config:
-brew "netcdf"
-brew "hdf5"    # tables
-brew "lz4"     # tables
-brew "c-blosc" # tables
 brew "autoconf"
 brew "automake"
-brew "libtool"
-# if installing scipy from source
-brew "openblas"
-brew "jq"
-
-brew "python@3.10"