diff --git a/.travis.yml b/.travis.yml
index 9074763..5bd591f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,18 +4,26 @@ language: cpp
 
 sudo: true
 
+os:
+  - linux
+  - osx
+
 compiler:
   - clang
   - gcc
 
+matrix:
+  exclude:
+    - os: osx
+      compiler: gcc
+
 branches:
   only:
     - master
     - travis
 
 before_script:
-  - sudo modprobe fuse
-  - cmake --version
+  - ./ci/setup.sh
 
 script:
   - ./ci/check.sh
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad1dd54..bceacec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,7 +97,12 @@ check_cxx_source_compiles ("#include <sys/types.h>
 include (CheckFuncs)
 check_function_exists_glibc (lchmod HAVE_LCHMOD)
 check_function_exists_glibc (utimensat HAVE_UTIMENSAT)
-check_function_exists_glibc (fdatasync HAVE_FDATASYNC)
+if (APPLE)
+  message ("-- There is no usable FDATASYNC on Apple")
+  set(HAVE_FDATASYNC FALSE)
+else()
+  check_function_exists_glibc (fdatasync HAVE_FDATASYNC)
+endif (APPLE)
 
 set (CMAKE_THREAD_PREFER_PTHREAD)
 find_package (Threads REQUIRED)
diff --git a/build.sh b/build.sh
index 04604d7..87985de 100755
--- a/build.sh
+++ b/build.sh
@@ -7,7 +7,7 @@ if [[ ! -d build ]]
 then
 	mkdir build
 	cd build
-	cmake ..
+	cmake .. $*
 	cd ..
 fi
 
diff --git a/ci/check.sh b/ci/check.sh
index 36367f9..5d5e9ca 100755
--- a/ci/check.sh
+++ b/ci/check.sh
@@ -1,12 +1,19 @@
 #!/bin/bash -eu
 
+cmake --version
+
+CFG=""
+if [ "$TRAVIS_OS_NAME" = "osx" ]; then
+  CFG="-DENABLE_NLS=OFF -DOPENSSL_ROOT_DIR=/usr/local/opt/openssl"
+fi
+
 if [[ ! -d build ]]
 then
-	mkdir build
+  mkdir build
 fi
 
 cd build
-cmake ..
+cmake .. ${CFG}
 make -j2
 make test
 
diff --git a/ci/setup.sh b/ci/setup.sh
new file mode 100755
index 0000000..1482194
--- /dev/null
+++ b/ci/setup.sh
@@ -0,0 +1,10 @@
+#!/bin/bash -eu
+
+if [ "$TRAVIS_OS_NAME" == "linux" ]; then
+  sudo modprobe fuse
+fi
+
+if [ "$TRAVIS_OS_NAME" == "osx" ]; then
+  brew cask install osxfuse
+fi
+
diff --git a/encfs/FileNode.cpp b/encfs/FileNode.cpp
index 4ae65a7..33fb132 100644
--- a/encfs/FileNode.cpp
+++ b/encfs/FileNode.cpp
@@ -258,7 +258,7 @@ int FileNode::sync(bool datasync) {
   int fh = io->open(O_RDONLY);
   if (fh >= 0) {
     int res = -EIO;
-#ifdef linux
+#if defined(HAVE_FDATASYNC)
     if (datasync) {
       res = fdatasync(fh);
     } else {
diff --git a/encfs/FileUtils.cpp b/encfs/FileUtils.cpp
index 3fb0c8c..444b2e8 100644
--- a/encfs/FileUtils.cpp
+++ b/encfs/FileUtils.cpp
@@ -1035,7 +1035,7 @@ RootPtr createV6Config(EncFS_Context *ctx,
     alg = findCipherAlgorithm("AES", keySize);
 
 // If case-insensitive system, opt for Block32 filename encoding
-#if DEFAULT_CASE_INSENSITIVE
+#if defined(DEFAULT_CASE_INSENSITIVE)
     nameIOIface = BlockNameIO::CurrentInterface(true);
 #else
     nameIOIface = BlockNameIO::CurrentInterface();