diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 4de11d7967..134a6d4033 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -82,7 +82,7 @@ jobs:
         max-size: 1000M
 
     - name: Configure
-      run: CI/before_script.macos.sh
+      run: CI/before_script.macos.sh -C
     - name: Build
       run: CI/macos/build.sh
 
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f779c52e44..23d94711f7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -555,11 +555,12 @@ Ubuntu_GCC_integration_tests_asan:
     - ccache/
   script:
     - CI/before_install.macos.sh
+    - brew install ccache
     - export CCACHE_BASEDIR="$(pwd)"
     - export CCACHE_DIR="$(pwd)/ccache"
     - mkdir -pv "${CCACHE_DIR}"
-    - CI/macos/ccache_prep.sh
-    - CI/before_script.macos.sh
+    - ccache -z -M "${CCACHE_SIZE}"
+    - CI/before_script.macos.sh -C
     - CI/macos/build.sh
     - cd build
     - for dmg in *.dmg; do mv "$dmg" "${dmg%.dmg}_${DMG_IDENTIFIER}_${CI_COMMIT_REF_NAME##*/}.dmg"; done
@@ -578,7 +579,7 @@ Ubuntu_GCC_integration_tests_asan:
           s3cmd put "${dmg}" s3://openmw-artifacts/${artifactDirectory}
         done
       fi
-    - ../CI/macos/ccache_show_stats.sh
+    - ccache -svv
   artifacts:
     paths:
       - build/OpenMW-*.dmg
diff --git a/CI/before_install.macos.sh b/CI/before_install.macos.sh
index 60d2d3a38c..84cc99d03d 100755
--- a/CI/before_install.macos.sh
+++ b/CI/before_install.macos.sh
@@ -1,7 +1,12 @@
 #!/bin/sh -ex
 
+brew tap --repair
+brew update --quiet
+
 if [[ "${MACOS_AMD64}" ]]; then
     ./CI/macos/before_install.amd64.sh
 else
     ./CI/macos/before_install.arm64.sh
 fi
+
+command -v cmake >/dev/null 2>&1 || brew install cmake
diff --git a/CI/before_script.macos.sh b/CI/before_script.macos.sh
index 15be5eb4e0..67a7e7accf 100755
--- a/CI/before_script.macos.sh
+++ b/CI/before_script.macos.sh
@@ -1,28 +1,91 @@
-#!/bin/sh -e
+#!/bin/bash -e
 
-# Silence a git warning
-git config --global advice.detachedHead false
+VERBOSE=""
+USE_CCACHE=""
+KEEP=""
+USE_WERROR=""
 
-rm -fr build
-mkdir build
+while [ $# -gt 0 ]; do
+	ARGSTR=$1
+	shift
+
+	if [ ${ARGSTR:0:1} != "-" ]; then
+		echo "Unknown argument $ARGSTR"
+		echo "Try '$0 -h'"
+		wrappedExit 1
+	fi
+
+	for (( i=1; i<${#ARGSTR}; i++ )); do
+		ARG=${ARGSTR:$i:1}
+		case $ARG in
+			V )
+				VERBOSE=true ;;
+
+			C )
+				USE_CCACHE=true ;;
+
+			k )
+				KEEP=true ;;
+
+			E )
+				USE_WERROR=true ;;
+
+			h )
+				cat <<EOF
+Usage: $0 [-VCkETh]
+Options:
+	-C
+		Use ccache.
+	-h
+		Show this message.
+	-k
+		Keep the old build directory, default is to delete it.
+	-V
+		Run verbosely
+	-E
+		Use warnings as errors (-Werror)
+EOF
+				exit 0
+				;;
+
+			* )
+				echo "Unknown argument $ARG."
+				echo "Try '$0 -h'"
+				exit 1 ;;
+		esac
+	done
+done
+
+if [[ -z $KEEP ]]; then
+    if [[ -n $VERBOSE && -d "build" ]]; then
+        echo "Deleting existing build directory"
+    fi
+    rm -fr build
+fi
+
+mkdir -p build
 cd build
 
 DEPENDENCIES_ROOT="/tmp/openmw-deps"
 
 if [[ "${MACOS_AMD64}" ]]; then
-    QT_PATH=$(arch -x86_64 /usr/local/bin/brew --prefix qt@6)
+    QT_PATH=$(arch -x86_64 /bin/bash -c "qmake -v | sed -rn -e 's/Using Qt version [.0-9]+ in //p'")
     ICU_PATH=$(arch -x86_64 /usr/local/bin/brew --prefix icu4c)
     OPENAL_PATH=$(arch -x86_64 /usr/local/bin/brew --prefix openal-soft)
 else
-    QT_PATH=$(brew --prefix qt@6)
+    QT_PATH=$(qmake -v | sed -rn -e "s/Using Qt version [.0-9]+ in //p")
     ICU_PATH=$(brew --prefix icu4c)
     OPENAL_PATH=$(brew --prefix openal-soft)
 fi
 
+if [[ -n $VERBOSE ]]; then
+    echo "Using Qt path: ${QT_PATH}"
+    echo "Using ICU path: ${ICU_PATH}"
+    echo "Using OpenAL path: ${OPENAL_PATH}"
+fi
+
 declare -a CMAKE_CONF_OPTS=(
 -D CMAKE_PREFIX_PATH="$DEPENDENCIES_ROOT;$QT_PATH;$OPENAL_PATH"
--D CMAKE_C_COMPILER_LAUNCHER="ccache"
--D CMAKE_CXX_COMPILER_LAUNCHER="ccache"
 -D CMAKE_CXX_FLAGS="-stdlib=libc++"
 -D CMAKE_C_COMPILER="clang"
 -D CMAKE_CXX_COMPILER="clang++"
@@ -62,14 +125,27 @@ else
     )
 fi
 
-if [[ "${MACOS_AMD64}" ]]; then
-    arch -x86_64 cmake \
-        "${CMAKE_CONF_OPTS[@]}" \
-        "${BUILD_OPTS[@]}" \
-        ..
-else
-    cmake \
+if [[ -n $USE_CCACHE ]]; then
+    CMAKE_CONF_OPTS+=(
+        -D CMAKE_C_COMPILER_LAUNCHER="ccache"
+        -D CMAKE_CXX_COMPILER_LAUNCHER="ccache"
+    )
+fi
+
+if [[ -n $USE_WERROR ]]; then
+    CMAKE_CONF_OPTS+=(
+        -D OPENMW_CXX_FLAGS="-Werror"
+    )
+fi
+
+if [[ -n $VERBOSE ]]; then
+    echo CMake arguments: \
         "${CMAKE_CONF_OPTS[@]}" \
         "${BUILD_OPTS[@]}" \
         ..
 fi
+
+cmake \
+    "${CMAKE_CONF_OPTS[@]}" \
+    "${BUILD_OPTS[@]}" \
+    ..
diff --git a/CI/macos/before_install.amd64.sh b/CI/macos/before_install.amd64.sh
index 5ed4f23b21..16b2724fa7 100755
--- a/CI/macos/before_install.amd64.sh
+++ b/CI/macos/before_install.amd64.sh
@@ -1,8 +1,10 @@
 #!/bin/sh -ex
 
-arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+command -v /usr/local/bin/brew || arch -x86_64 bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
 
-arch -x86_64 /usr/local/bin/brew install curl xquartz gd fontconfig freetype harfbuzz brotli ccache cmake qt@6 openal-soft icu4c yaml-cpp sqlite
+arch -x86_64 bash -c "command -v qmake >/dev/null 2>&1 && qmake -v | grep -F 'Using Qt version 6.' >/dev/null || /usr/local/bin/brew install qt@6"
+
+arch -x86_64 /usr/local/bin/brew install curl xquartz gd fontconfig freetype harfbuzz brotli openal-soft icu4c yaml-cpp sqlite
 
 curl -fSL -R -J https://gitlab.com/OpenMW/openmw-deps/-/raw/main/macos/openmw-deps-20240802.zip -o ~/openmw-deps.zip
 unzip -o ~/openmw-deps.zip -d /tmp > /dev/null
diff --git a/CI/macos/before_install.arm64.sh b/CI/macos/before_install.arm64.sh
index d1fb572f01..60217093ec 100755
--- a/CI/macos/before_install.arm64.sh
+++ b/CI/macos/before_install.arm64.sh
@@ -1,11 +1,8 @@
 #!/bin/sh -ex
 
-brew tap --repair
-brew update --quiet
+command -v qmake >/dev/null 2>&1 && qmake -v | grep -F "Using Qt version 6." >/dev/null || brew install qt@6
 
-command -v cmake >/dev/null 2>&1 || brew install cmake
-
-brew install curl xquartz gd fontconfig freetype harfbuzz brotli qt@6 ccache openal-soft icu4c yaml-cpp sqlite
+brew install curl xquartz gd fontconfig freetype harfbuzz brotli openal-soft icu4c yaml-cpp sqlite
 
 curl -fSL -R -J https://gitlab.com/OpenMW/openmw-deps/-/raw/main/macos/openmw-deps-20240818-arm64.tar.xz -o ~/openmw-deps.tar.xz
 tar xf ~/openmw-deps.tar.xz -C /tmp > /dev/null
diff --git a/CI/macos/ccache_prep.sh b/CI/macos/ccache_prep.sh
deleted file mode 100755
index abd0103be0..0000000000
--- a/CI/macos/ccache_prep.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh -ex
-
-if [[ "${MACOS_AMD64}" ]]; then
-    arch -x86_64 ccache -z -M "${CCACHE_SIZE}"
-else
-    ccache -z -M "${CCACHE_SIZE}"
-fi
diff --git a/CI/macos/ccache_show_stats.sh b/CI/macos/ccache_show_stats.sh
deleted file mode 100755
index d7cc48c25e..0000000000
--- a/CI/macos/ccache_show_stats.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh -ex
-
-if [[ "${MACOS_AMD64}" ]]; then
-    arch -x86_64 ccache -svv
-else
-    ccache -svv
-fi