diff --git a/.github/scripts/macOS/prepare.sh b/.github/scripts/macOS/prepare.sh
index 5e4f2cbf6..f8cb87717 100755
--- a/.github/scripts/macOS/prepare.sh
+++ b/.github/scripts/macOS/prepare.sh
@@ -26,15 +26,13 @@ mkdir $TEMP_INST
 cd $TEMP_INST
 
 # Install XIMEA
-if [ -n "$sdk_pass" ]; then
-        curl -S --netrc-file <(cat <<<"machine frakira.fi.muni.cz login sdk password $sdk_pass") https://frakira.fi.muni.cz/~xpulec/sdks/m3api.tar.xz -O
-        sudo tar xJf m3api.tar.xz -C $(xcrun --show-sdk-path)/System/Library/Frameworks
+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 AJA
-if [ -n "$sdk_pass" ]; then
-        curl -S --netrc-file <(cat <<<"machine frakira.fi.muni.cz login sdk password $sdk_pass") https://frakira.fi.muni.cz/~xpulec/sdks/ntv2sdkmac.zip -O
-        unzip ntv2sdkmac.zip -d /tmp
+if [ -f /var/tmp/sdks/ntv2sdkmac.zip ]; then
+        unzip /var/tmp/sdks/ntv2sdkmac.zip -d /tmp
         mv /tmp/ntv2sdk* $AJA_INST
         cd $AJA_INST/ajalibraries/ajantv2/build
         xcodebuild -project ajantv2.xcodeproj
@@ -45,17 +43,13 @@ if [ -n "$sdk_pass" ]; then
 fi
 
 # DELTACAST
-if [ -n "$sdk_pass" ]; then
-        curl -S --user sdk:$sdk_pass https://frakira.fi.muni.cz/~xpulec/sdks/VideoMasterHD_mac.tar.xz -O
-        sudo tar xJf VideoMasterHD_mac.tar.xz -C $(xcrun --show-sdk-path)/System/Library/Frameworks
-        rm VideoMasterHD_mac.tar.xz
+if [ -f /var/tmp/sdks/VideoMasterHD_mac.tar.xz ]; then
+        sudo tar xJf /var/tmp/sdks/VideoMasterHD_mac.tar.xz -C $(xcrun --show-sdk-path)/System/Library/Frameworks
 fi
 
 # Install NDI
-if [ -n "$sdk_pass" -a "$GITHUB_REF" = refs/heads/ndi-build ]; then
-        curl -S --netrc-file <(cat <<<"machine frakira.fi.muni.cz login sdk password $sdk_pass") https://frakira.fi.muni.cz/~xpulec/sdks/NDISDK_Apple.pkg -O
-        sudo installer -pkg NDISDK_Apple.pkg -target /
-        rm NDISDK_Apple.pkg
+if [ -f /var/tmp/sdks/NDISDK_Apple.pkg  ]; then
+        sudo installer -pkg /var/tmp/sdks/NDISDK_Apple.pkg -target /
         sudo mv "/Library/NDI SDK for Apple/" /Library/NDI
         cd /Library/NDI/lib/x64
         sudo ln -s libndi.?.dylib libndi.dylib
diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 63aadd14f..1111f0f89 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -122,6 +122,17 @@ jobs:
     - uses: actions/checkout@v1
       with:
         submodules: true
+    - name: Cache SDKs
+      id: cache-macos-sdks
+      uses: actions/cache@v1
+      with:
+        path: '/var/tmp/sdks'
+        key: cache-macos-sdks
+    - name: Download SDKs
+      if: steps.cache-macos-sdk.outputs.cache-hit != 'true' && env.sdk_pass != null
+      run: |
+        mkdir /var/tmp/sdks && cd /var/tmp/sdks
+        curl -S --user sdk:$sdk_pass -O https://frakira.fi.muni.cz/~xpulec/sdks/m3api.tar.xz -O https://frakira.fi.muni.cz/~xpulec/sdks/ntv2sdkmac.zip -O https://frakira.fi.muni.cz/~xpulec/sdks/VideoMasterHD_mac.tar.xz -O https://frakira.fi.muni.cz/~xpulec/sdks/NDISDK_Apple.pkg
     - name: bootstrap
       run: |
         . .github/scripts/environment.sh