diff --git a/.travis.yml b/.travis.yml
index 13bd0d2..9e87746 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -319,17 +319,18 @@ matrix:
               key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"
 
 # clang, OS X
-    - os: osx
-      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
-      osx_image: xcode9.4
-
-    - os: osx
-      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
-      osx_image: xcode10.3
-
-    - os: osx
-      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,17
-      osx_image: xcode11.2
+# Disabled because OS X builds are slow on Travis CI
+#    - os: osx
+#      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
+#      osx_image: xcode9.4
+#
+#    - os: osx
+#      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
+#      osx_image: xcode10.3
+#
+#    - os: osx
+#      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,17
+#      osx_image: xcode11.2
 
 install:
   - GIT_FETCH_JOBS=8