disable valgrind for osx even for 64 bit builds...
diff --git a/.travis.yml b/.travis.yml
index 9264eaf..48cfe07 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -313,12 +313,16 @@
   # debug x64
   - cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_FLAGS="-m64" .
   - make clean && make -k -j2
-  - cmake -DTEST_MODE=VALGRIND . && ctest --output-on-failure
+  # valgrind for 64bit under osx fails TOO
+  - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then cmake -DTEST_MODE=VALGRIND . && ctest --output-on-failure ; fi
+  # - cmake -DTEST_MODE=VALGRIND . && ctest --output-on-failure
   - cmake -DTEST_MODE=COMPARE  . && ctest --output-on-failure
   # release x64
   - cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-m64" .
   - make clean && make -k -j2
-  - cmake -DTEST_MODE=VALGRIND . && ctest --output-on-failure
+  # valgrind for 64bit under osx fails TOO
+  - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then cmake -DTEST_MODE=VALGRIND . && ctest --output-on-failure ; fi
+  # - cmake -DTEST_MODE=VALGRIND . && ctest --output-on-failure
   - cmake -DTEST_MODE=COMPARE  . && ctest --output-on-failure
   # debug x86
   - cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_FLAGS="-m32" .