diff --git a/.travis.yml b/.travis.yml
index 78a0a30dc7e0d8bf8df33b561a1f0b2d9c03b4e8..f0ed0a8ec477d555cc1b1f8cb82bfaa3bbe2c606 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -221,9 +221,11 @@ matrix:
 #        - os: osx
 #          osx_image: xcode7.2
 #          #Apple LLVM version 7.0.2 (clang-700.1.81)
+#        - os: osx
+#          osx_image: xcode7.3
+#          #Apple LLVM version 7.3.0 (clang-703.0.31)
         - os: osx
-          #osx_image: xcode7.3
-          #Apple LLVM version 7.3.0 (clang-703.0.31)
+          #Default: macOS 10.13 and Xcode 9.4.1
     allow_failures:
       - compiler: clang-3.5
       - compiler: clang-3.6