only download via curl if file on server is different than what is currently cached on VM.

.gitlab-ci.yml

@@ -38,7 +38,7 @@ MacOS:
   allow_failure: true
   script:
     #- macos_qt_formula=qt
-    #- CI/before_install.osx.sh
+    - CI/before_install.osx.sh
     - CI/before_script.osx.sh
     - make -j2
     - DESTDIR=artifacts make install

CI/before_install.osx.sh

@@ -6,5 +6,5 @@ brew outdated cmake || brew upgrade cmake
 brew outdated pkgconfig || brew upgrade pkgconfig
 brew install qt
 
-curl https://downloads.openmw.org/osx/dependencies/openmw-deps-100d2e0.zip -o ~/openmw-deps.zip
+curl -fSL -R -J https://downloads.openmw.org/osx/dependencies/openmw-deps-100d2e0.zip -o ~/openmw-deps.zip
 unzip ~/openmw-deps.zip -d /private/tmp/openmw-deps > /dev/null