diff --git a/.github/scripts/macOS/prepare.sh b/.github/scripts/macOS/prepare.sh
index 68f961b9b..aa5a51710 100755
--- a/.github/scripts/macOS/prepare.sh
+++ b/.github/scripts/macOS/prepare.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -eu
+#!/bin/bash -eux
 
 AJA_INST=/var/tmp/ntv2sdk # AJA installation directory
 TEMP_INST=/tmp/install
@@ -25,10 +25,11 @@ brew install qt
 mkdir $TEMP_INST
 cd $TEMP_INST
 
-# Install XIMEA
-if [ -f /var/tmp/sdks/m3api.tar.xz ]; then
-        sudo tar xJf /var/tmp/sdks/m3api.tar.xz -C $(xcrun --show-sdk-path)/System/Library/Frameworks
-fi
+# Install XIMEA (see <dmg>/install.app/Contents/MacOS/install.sh)
+hdiutil mount /var/tmp/sdks-free/XIMEA_OSX_SP.dmg
+sudo cp -a /Volumes/XIMEA/m3api.framework $(xcrun --show-sdk-path)/System/Library/Frameworks
+sudo xattr -dr com.apple.quarantine $(xcrun --show-sdk-path)/System/Library/Frameworks
+umount /Volumes/XIMEA
 
 # Install AJA
 if [ -f /var/tmp/sdks/ntv2sdkmac.zip ]; then
diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index ad9112bf7..e1fe5f393 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -145,7 +145,18 @@ jobs:
       if: steps.cache-macos-sdk.outputs.cache-hit != 'true' && env.SDK_URL != null
       run: |
         mkdir /var/tmp/sdks && cd /var/tmp/sdks
-        curl -S -O $SDK_URL/m3api.tar.xz -O $SDK_URL/ntv2sdkmac.zip -O $SDK_URL/VideoMasterHD_mac.tar.xz -O $SDK_URL/NDISDK_Apple.pkg
+        curl -S -O $SDK_URL/ntv2sdkmac.zip -O $SDK_URL/VideoMasterHD_mac.tar.xz -O $SDK_URL/NDISDK_Apple.pkg
+    - name: Cache Free SDKs
+      id: cache-macos-free-sdks
+      uses: actions/cache@v1
+      with:
+        path: '/var/tmp/free-sdks'
+        key: cache-macos-free-sdks
+    - name: Download Free SDKs
+      if: steps.cache-macos-free-sdk.outputs.cache-hit != 'true'
+      run: |
+        mkdir /var/tmp/sdks-free && cd /var/tmp/sdks-free
+        curl -S -LO https://www.ximea.com/downloads/recent/XIMEA_OSX_SP.dmg
     - name: bootstrap
       run: |
         . .github/scripts/environment.sh