Revert back to minimum_os_version = 10.12.

Travis uses 10.12 for its Xcode 9.2 image. Once we move to Xcode 9.4
we should be able to roll forward again.

PiperOrigin-RevId: 202507554
diff --git a/.travis.yml b/.travis.yml
index 9d2aeb2..d89d152 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,5 +9,5 @@
 script:
   - bazel version
   - bazel build //:tulsi --cpu=darwin_x86_64 --apple_platform_type=macos
-  - bazel test //src/TulsiGeneratorTests/... --cpu=darwin_x86_64 --apple_platform_type=macos
-  - bazel test //src/TulsiGeneratorIntegrationTests/... --cpu=darwin_x86_64 --apple_platform_type=macos
+  - bazel test //src/TulsiGeneratorTests --cpu=darwin_x86_64 --apple_platform_type=macos
+  - bazel test //src/TulsiGeneratorIntegrationTests --cpu=darwin_x86_64 --apple_platform_type=macos
diff --git a/BUILD b/BUILD
index aa172c4..d26594a 100644
--- a/BUILD
+++ b/BUILD
@@ -64,7 +64,7 @@
     bundle_id = "com.google.Tulsi",
     bundle_name = "Tulsi",
     infoplists = [":Info.plist"],
-    minimum_os_version = "10.13",
+    minimum_os_version = "10.12",
     strings = [":strings"],
     version = ":AppVersion",
     deps = [
diff --git a/src/TulsiGeneratorIntegrationTests/tulsi_integration_test.bzl b/src/TulsiGeneratorIntegrationTests/tulsi_integration_test.bzl
index 7a695b9..ed472b2 100644
--- a/src/TulsiGeneratorIntegrationTests/tulsi_integration_test.bzl
+++ b/src/TulsiGeneratorIntegrationTests/tulsi_integration_test.bzl
@@ -24,7 +24,7 @@
 
     macos_unit_test(
         name = name,
-        minimum_os_version = "10.13",
+        minimum_os_version = "10.12",
         deps = [":%s" % lib_name],
         data = [
             "//:for_bazel_tests",
diff --git a/src/TulsiGeneratorTests/BUILD b/src/TulsiGeneratorTests/BUILD
index 66abb16..b6179e5 100644
--- a/src/TulsiGeneratorTests/BUILD
+++ b/src/TulsiGeneratorTests/BUILD
@@ -12,6 +12,6 @@
 
 macos_unit_test(
     name = "TulsiGeneratorTests",
-    minimum_os_version = "10.13",
+    minimum_os_version = "10.12",
     deps = [":TulsiGeneratorTestsLib"],
 )
diff --git a/src/tools/bazel_cache_reader/BUILD b/src/tools/bazel_cache_reader/BUILD
index cd79428..ab73d3d 100644
--- a/src/tools/bazel_cache_reader/BUILD
+++ b/src/tools/bazel_cache_reader/BUILD
@@ -14,6 +14,6 @@
 
 macos_command_line_application(
     name = "bazel_cache_reader",
-    minimum_os_version = "10.13",
+    minimum_os_version = "10.12",
     deps = [":bazel_cache_reader_lib"],
 )