message: Go back to xcode 11.3.
diff: @@ -154,12 +154,7 @@ jobs:
  env: PATH=/c/Python39:/c/Python39/Scripts:$PATH
  - name: MacOS 4.26
  os: osx
  - osx_image: xcode12
  - addons:
  - homebrew:
  - packages:
  - - p7zip
  - update: true
  + osx_image: xcode11.3
  install:
  - python -m pip install --upgrade pip
  - pip3 install --upgrade pip
  @@ -181,7 +176,7 @@ jobs:
  - cd $HOME/UE_4.26/Users/Shared/Epic\ Games/UE_4.26/Engine/Build/BatchFiles
  - ./RunUAT.sh BuildPlugin -Plugin="$CLONEDIR/CesiumForUnreal.uplugin" -Package="$CLONEDIR/../packages/CesiumForUnreal" -CreateSubFolder -TargetPlatforms=Mac
  - cd "$CLONEDIR/../packages"
  - - 7z a ${BUILD_CESIUM_UNREAL_PACKAGE_NAME}.zip CesiumForUnreal/
  + - zip -r -X ${BUILD_CESIUM_UNREAL_PACKAGE_NAME}.zip CesiumForUnreal
  - aws s3 cp ${BUILD_CESIUM_UNREAL_PACKAGE_NAME}.zip s3://builds-cesium-unreal/
  - export PACKAGE_LINK=$(aws --region us-east-1 s3 presign s3://builds-cesium-unreal/${BUILD_CESIUM_UNREAL_PACKAGE_NAME}.zip --expires-in 315360000)
  - http POST "https://api.github.com/repos/${TRAVIS_REPO_SLUG}/statuses/${TRAVIS_COMMIT}" "Authorization:token ${GITHUB_TOKEN}" state=success context=UE4.26-macOS "target_url=${PACKAGE_LINK}" --ignore-stdin
  @@ -258,7 +253,8 @@ jobs:
  - export PACKAGE_LINK=$(aws --region us-east-1 s3 presign s3://builds-cesium-unreal/${BUILD_CESIUM_UNREAL_PACKAGE_NAME}.zip --expires-in 315360000)
  - http POST "https://api.github.com/repos/${TRAVIS_REPO_SLUG}/statuses/${TRAVIS_COMMIT}" "Authorization:token ${GITHUB_TOKEN}" state=success context=UE4.27-Linux "target_url=${PACKAGE_LINK}" --ignore-stdin
  env: PATH=/c/Python39:/c/Python39/Scripts:$PATH
  - - stage: Combine Packages 4.26
  + - stage: Combine Packages
  + name: Combine for UE 4.26
  os: linux
  dist: focal
  git:
  @@ -285,7 +281,7 @@ jobs:
  - aws s3 cp CesiumForUnreal-426-${CESIUM_UNREAL_VERSION}.zip s3://builds-cesium-unreal/
  - export PACKAGE_LINK=$(aws --region us-east-1 s3 presign s3://builds-cesium-unreal/CesiumForUnreal-426-${CESIUM_UNREAL_VERSION}.zip --expires-in 315360000)
  - http POST "https://api.github.com/repos/${TRAVIS_REPO_SLUG}/statuses/${TRAVIS_COMMIT}" "Authorization:token ${GITHUB_TOKEN}" state=success context=UE4.26-AllPlatforms "target_url=${PACKAGE_LINK}" --ignore-stdin
  - - stage: Combine Packages 4.27
  + - name: Combine for UE 4.27
  os: linux
  dist: focal
  git:
  