diff --git a/package/osx/travis-build-main.sh b/package/osx/travis-build-main.sh
index 957732361..ef4f73332 100755
--- a/package/osx/travis-build-main.sh
+++ b/package/osx/travis-build-main.sh
@@ -2,6 +2,11 @@
 set -euo pipefail
 
 brew update -v
+
+# These two commands are only needed on 10.12:
+rm -rf /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask
+brew uninstall --force postgis cgal sfcgal
+
 brew install boost     || brew upgrade boost
 brew install perl      || brew upgrade perl
 brew install cpanminus || brew upgrade cpanminus
@@ -12,7 +17,17 @@ export SLIC3R_STATIC=1
 export BOOST_DIR=/usr/local
 perl ./Build.PL
 
+# remove X11 because otherwise OpenGL.pm will link libglut.3.dylib instead of GLUT.framework
+sudo rm -rf /opt/X11*
+cpanm --local-lib local-lib --reinstall OpenGL  # this updates the cache, remove it after one commit
+
 export LIBRARY_PATH=/usr/local/lib
+
+# One Wx test fails on 10.12; seems harmless
+if [ $TRAVIS_OSX_IMAGE == 'xcode9.2']; then
+    cpanm --local-lib local-lib -f Wx
+fi
+
 perl ./Build.PL --gui
 
 # Install PAR::Packer now so that it gets cached by Travis