diff --git a/.travis.yml b/.travis.yml
index ea6286e..24ca998 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -108,19 +108,57 @@ matrix:
 #       env:
 #         - MATRIX_EVAL="CC=clang-5.0"
 
+    # GCC on macOS
+    - os: osx
+      osx_image: xcode9.4
+      env:
+        - MATRIX_EVAL="CC=gcc-4.9"
+
+    - os: osx
+      osx_image: xcode9.4
+      env:
+        - MATRIX_EVAL="brew install gcc@5 && CC=gcc-5"
+
+    - os: osx
+      osx_image: xcode9.4
+      env:
+        - MATRIX_EVAL="brew install gcc@6 && CC=gcc-6"
+
+    - os: osx
+      osx_image: xcode9.4
+      env:
+        - MATRIX_EVAL="brew install gcc@7 && CC=gcc-7"
+
+    # Clang on macOS
+    - os: osx
+      osx_image: xcode9.4
+      env:
+        - MATRIX_EVAL="brew install llvm && brew link --overwrite llvm --force && CC=/usr/local/bin/clang"
+
+
 before_install:
   - export MAKEFLAGS="-j$(nproc)"
   - |
-    sudo systemctl stop apt-daily.timer &&
-    sudo systemctl stop apt-daily.service &&
-    sudo systemctl kill --kill-who=all apt-daily.service &&
-    while ! (systemctl list-units --all apt-daily.service | fgrep -q dead) ; do
-      sleep 1
-    done &&
-    sudo apt-get update -q
+    if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      brew update
+    else 
+      sudo systemctl stop apt-daily.timer &&
+      sudo systemctl stop apt-daily.service &&
+      sudo systemctl kill --kill-who=all apt-daily.service &&
+      while ! (systemctl list-units --all apt-daily.service | fgrep -q dead) ; do
+        sleep 1
+      done &&
+      sudo apt-get update -q
+    fi
 
 install:
-  - sudo apt-get install -y libvips-dev uuid-dev
+  - |
+    if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      brew unlink python
+      brew install vips --with-imagemagick --without-graphicsmagick --with-openexr --with-openslide
+    else
+      sudo apt-get install -y libvips-dev uuid-dev
+    fi
 
 before_script:
   - eval "${MATRIX_EVAL}"
diff --git a/src/regions/Makefile b/src/regions/Makefile
index 3d9e5dc..d4ab543 100644
--- a/src/regions/Makefile
+++ b/src/regions/Makefile
@@ -23,8 +23,6 @@ $(TARGET): main.o region.o llist.o name.o
 
 %.o: %.c
 	$(CC) -MMD -c $(CFLAGS) -o $@ $<
-	sed -i'.bak' 's,\($*\.o\)[ :]*\(.*\),$@:$$\(wildcard \2\),g' $*.d
-	$(RM) $*.d.bak
 
 test: $(TESTS)
 	for t in $^ ; do echo "$$t:" ; "./$$t" ; done