message: infra: Use macOS 10.15 and newer OSX SDK.
diff: @@ -72,7 +72,7 @@ builder_mixins {
  }
  builder_mixins {
  name: "mac"
  - dimensions: "os:Mac-10.13"
  + dimensions: "os:Mac-10.15"
  caches: { # cache for depot_tools.osx_sdk recipe module
  name: "osx_sdk"
  path: "osx_sdk"
  @@ -80,7 +80,7 @@ builder_mixins {
  recipe {
  properties_j: <<EOF
  $depot_tools/osx_sdk:{
  - "sdk_version": "10b61"
  + "sdk_version": "11b52"
  }
  EOF
  }
  