diff --git a/.travis.yml b/.travis.yml
index 32389129f4a1ddf9c5f3d68b39a8d375e32f546d..2c8dc7034137ab6a157c4d2f22a4d897d6c96be2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,14 +20,15 @@ compiler:
     - gcc
     - clang
 
-before_install:
-    - set -e
-    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then brew update                         ; fi
-    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then brew install homebrew/science/geant4; fi
-    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then geant4-config --version; fi
-    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then geant4-config --libs; fi
-    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then geant4-config --cflags; fi
-    - set +e
+#Trying to test g4 via homebrew on osx. But fails when building libg4mcpl.so. To be investigated.
+#before_install:
+#    - set -e
+#    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then brew update                         ; fi
+#    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then brew install homebrew/science/geant4; fi
+#    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then geant4-config --version; fi
+#    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then geant4-config --libs; fi
+#    - if [[ "$TRAVIS_OS_NAME" == "osx" -a "$BUILD" == "RELEASE" ]]; then geant4-config --cflags; fi
+#    - set +e
 
 before_script:
     - set -e