Try to update cmake on Mac travis.

.travis.yml

@@ -18,11 +18,14 @@ before_install:
 
 script:
   - export VERSION=`echo "$(git tag -l --points-at HEAD)"`
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export THREAD_COUNT=`echo "$(nproc --all)"`; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export THREAD_COUNT=`echo "$(sysctl -n hw.physicalcpu)"`; fi
   - mkdir build && cd build
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then cmake -DMM_VERSION="$VERSION" -DCMAKE_C_COMPILER=/usr/bin/gcc-7 -DCMAKE_CXX_COMPILER=/usr/bin/g++-7 ..; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then cmake -DMM_VERSION="$VERSION" ..; fi
-  - cmake --build . --target marketmaker-mainnet -j $(nproc --all)
-  - cmake --build . --target marketmaker-testnet -j $(nproc --all)
+  - echo "cmake --build . --target marketmaker-mainnet -j $THREAD_COUNT"
+  - cmake --build . --target marketmaker-mainnet -j $THREAD_COUNT
+  - cmake --build . --target marketmaker-testnet -j $THREAD_COUNT
 
 cache:
   apt: true

travis_cmake_mac.sh

@@ -1,9 +1,6 @@
 #!/bin/bash
 brew uninstall cmake --force
 wget https://cmake.org/files/v3.12/cmake-3.12.0-rc2-Darwin-x86_64.tar.gz
-tar -xvzf cmake-3.12.0-rc2-Darwin-x86_64.tar.gz
+tar -xzf cmake-3.12.0-rc2-Darwin-x86_64.tar.gz
 cp -r cmake-3.12.0-rc2-Darwin-x86_64/CMake.app/Contents/bin/* /usr/local/bin/
 cp -r cmake-3.12.0-rc2-Darwin-x86_64/CMake.app/Contents/share/* /usr/local/share/
-sysctl -n hw.physicalcpu
-which cmake
-cmake --version