diff --git a/src/fs_base_utime.hpp b/src/fs_base_utime.hpp
index ae1b1afe..b57ae9f1 100644
--- a/src/fs_base_utime.hpp
+++ b/src/fs_base_utime.hpp
@@ -35,8 +35,13 @@ namespace fs
   {
     struct timespec times[2];
 
+#if __APPLE__
+    times[0] = st.st_atimespec;
+    times[1] = st.st_mtimespec;
+#else
     times[0] = st.st_atim;
     times[1] = st.st_mtim;
+#endif
 
     return fs::utime(AT_FDCWD,path,times,0);
   }
@@ -49,8 +54,13 @@ namespace fs
   {
     struct timespec times[2];
 
+#if __APPLE__
+    times[0] = st.st_atimespec;
+    times[1] = st.st_mtimespec;
+#else
     times[0] = st.st_atim;
     times[1] = st.st_mtim;
+#endif
 
     return fs::utime(fd,times);
   }
diff --git a/src/fs_base_utime_generic.hpp b/src/fs_base_utime_generic.hpp
index eeea26ad..13e2d8bd 100644
--- a/src/fs_base_utime_generic.hpp
+++ b/src/fs_base_utime_generic.hpp
@@ -25,6 +25,10 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 
+#if __APPLE__
+#import <sys/param.h> /* MAXPATHLEN */
+#endif
+
 #ifndef UTIME_NOW
 # define UTIME_NOW  ((1l << 30) - 1l)
 #endif
@@ -123,6 +127,7 @@ _set_utime_omit_to_current_value(const int              dirfd,
 {
   int rv;
   struct stat st;
+  timespec *atime, *mtime;
 
   if(!_any_timespec_is_utime_omit(ts))
     return 0;
@@ -131,10 +136,18 @@ _set_utime_omit_to_current_value(const int              dirfd,
   if(rv == -1)
     return -1;
 
+#if __APPLE__
+  atime = &st.st_atimespec;
+  mtime = &st.st_mtimespec;
+#else
+  atime = &st.st_atim;
+  mtime = &st.st_mtim;
+#endif
+  
   if(ts[0].tv_nsec == UTIME_OMIT)
-    TIMESPEC_TO_TIMEVAL(&tv[0],&st.st_atim);
+    TIMESPEC_TO_TIMEVAL(&tv[0],atime);
   if(ts[1].tv_nsec == UTIME_OMIT)
-    TIMESPEC_TO_TIMEVAL(&tv[1],&st.st_mtim);
+    TIMESPEC_TO_TIMEVAL(&tv[1],mtime);
 
   return 0;
 }
@@ -148,6 +161,7 @@ _set_utime_omit_to_current_value(const int             fd,
 {
   int rv;
   struct stat st;
+  timespec *atime, *mtime;
 
   if(!_any_timespec_is_utime_omit(ts))
     return 0;
@@ -156,10 +170,18 @@ _set_utime_omit_to_current_value(const int             fd,
   if(rv == -1)
     return -1;
 
+#if __APPLE__
+  atime = &st.st_atimespec;
+  mtime = &st.st_mtimespec;
+#else
+  atime = &st.st_atim;
+  mtime = &st.st_mtim;
+#endif
+
   if(ts[0].tv_nsec == UTIME_OMIT)
-    TIMESPEC_TO_TIMEVAL(&tv[0],&st.st_atim);
+    TIMESPEC_TO_TIMEVAL(&tv[0],atime);
   if(ts[1].tv_nsec == UTIME_OMIT)
-    TIMESPEC_TO_TIMEVAL(&tv[1],&st.st_mtim);
+    TIMESPEC_TO_TIMEVAL(&tv[1],mtime);
 
   return 0;
 }
@@ -269,8 +291,22 @@ namespace fs
     if(rv == -1)
       return -1;
 
-    if((flags & AT_SYMLINK_NOFOLLOW) == 0)
+    if((flags & AT_SYMLINK_NOFOLLOW) == 0) {
+#if __APPLE__
+      
+      char fullpath[MAXPATHLEN];
+      
+      if (fcntl(dirfd,F_GETPATH,fullpath) < 0)
+        return (errno=errno,-1);
+      
+      if (strlcat(fullpath, "/", MAXPATHLEN) > MAXPATHLEN || strlcat(fullpath, path.c_str(), MAXPATHLEN) > MAXPATHLEN)
+          return (errno=ENAMETOOLONG,-1);
+      
+      return ::utimes(fullpath,tvp);
+#else
       return ::futimesat(dirfd,path.c_str(),tvp);
+#endif
+    }
     if(_can_call_lutimes(dirfd,path,flags))
       return ::lutimes(path.c_str(),tvp);
 
diff --git a/src/fs_fallocate_osx.icpp b/src/fs_fallocate_osx.icpp
index 70894142..6d57f471 100644
--- a/src/fs_fallocate_osx.icpp
+++ b/src/fs_fallocate_osx.icpp
@@ -18,6 +18,7 @@
 
 #include "errno.hpp"
 #include "fs_fallocate.hpp"
+#include "fs_base_ftruncate.hpp"
 
 namespace fs
 {
@@ -52,6 +53,6 @@ namespace fs
     if(mode)
       return (errno=EOPNOTSUPP,-1);
 
-    return ::_fallocate_core(fd,offset,len);
+    return _fallocate_core(fd,offset,len);
   }
 }
diff --git a/src/fs_inode.hpp b/src/fs_inode.hpp
index b217305f..7e07a7e0 100644
--- a/src/fs_inode.hpp
+++ b/src/fs_inode.hpp
@@ -34,7 +34,8 @@ namespace fs
     void
     recompute(struct stat &st)
     {
-      st.st_ino |= (st.st_dev << 32);
+      uint64_t st_dev = st.st_dev; /* Mac OS has a 32-bit device ID */
+      st.st_ino |= (st_dev << 32);
     }
   }
 }
diff --git a/src/gidcache.cpp b/src/gidcache.cpp
index 3bace59a..0d5afbfb 100644
--- a/src/gidcache.cpp
+++ b/src/gidcache.cpp
@@ -109,7 +109,15 @@ gid_t_cache::cache(const uid_t uid,
       rec->size = 0;
       ::getgrouplist(pwd.pw_name,gid,NULL,&rec->size);
       rec->size = std::min(MAXGIDS,rec->size);
+      
+ #if __APPLE__ 
+      // OSX:   getgrouplist(const char *name, int basegid, int *groups, int *ngroups)
+      rv = ::getgrouplist(pwd.pw_name,gid,(int*)rec->gids,&rec->size);
+#else
+      // Linux: getgrouplist(const char *name, gid_t group, gid_t *groups int *ngroups)
       rv = ::getgrouplist(pwd.pw_name,gid,rec->gids,&rec->size);
+#endif
+      
       if(rv == -1)
         {
           rec->gids[0] = gid;
diff --git a/tools/cppfind b/tools/cppfind
index bac073eb..fa9dbad4 100755
--- a/tools/cppfind
+++ b/tools/cppfind
@@ -2,6 +2,6 @@
 
 FUSE_CFLAGS="$(pkg-config --cflags fuse) -DFUSE_USE_VERSION=29"
 
-echo "#include <fuse.h>" | cpp ${FUSE_CFLAGS} | grep "${1}" > /dev/null
+echo "#include <fuse.h>" | cc -E ${FUSE_CFLAGS} - | grep "${1}" > /dev/null
 
 [ "$?" != "0" ]; echo $?