diff --git a/snap-server.cabal b/snap-server.cabal
--- a/snap-server.cabal
+++ b/snap-server.cabal
@@ -1,5 +1,5 @@
 name:           snap-server
-version:        1.0.3.2
+version:        1.0.3.3
 synopsis:       A web server for the Snap Framework
 description:
   Snap is a simple and fast web development framework and server written in
@@ -145,8 +145,15 @@
       System.SendFile,
       System.SendFile.Linux
 
+-- Disabling sendfile() on OSX for now. See
+--
+-- https://github.com/snapframework/snap-core/issues/274 and
+-- https://github.com/snapframework/snap-core/issues/91
+--
   if os(darwin) && !flag(portable)
-    cpp-options: -DOSX -DHAS_UNIX_SOCKETS
+     cpp-options: -DHAS_UNIX_SOCKETS
+  -- if os(darwin) && !flag(portable)
+  --   cpp-options: -DOSX -DHAS_UNIX_SOCKETS
 
   if os(freebsd) && !flag(portable)
     cpp-options: -DFREEBSD -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
@@ -270,14 +277,15 @@
       System.SendFile.Tests
     c-sources: test/cbits/errno_util.c
 
-
   if os(darwin) && !flag(portable)
-    cpp-options: -DOSX -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
-    other-modules:
-      System.SendFile,
-      System.SendFile.Darwin,
-      System.SendFile.Tests
-    c-sources: test/cbits/errno_util.c
+     cpp-options: -DHAS_UNIX_SOCKETS
+--  if os(darwin) && !flag(portable)
+--    cpp-options: -DOSX -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
+--    other-modules:
+--      System.SendFile,
+--      System.SendFile.Darwin,
+--      System.SendFile.Tests
+--    c-sources: test/cbits/errno_util.c
 
   if os(freebsd) && !flag(portable)
     cpp-options: -DFREEBSD -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
@@ -369,10 +377,12 @@
       System.SendFile.Linux
 
   if os(darwin) && !flag(portable)
-    cpp-options: -DOSX -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
-    other-modules:
-      System.SendFile,
-      System.SendFile.Darwin
+     cpp-options: -DHAS_UNIX_SOCKETS
+--  if os(darwin) && !flag(portable)
+--    cpp-options: -DOSX -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
+--    other-modules:
+--      System.SendFile,
+--      System.SendFile.Darwin
 
   if os(freebsd) && !flag(portable)
     cpp-options: -DFREEBSD -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
@@ -465,10 +475,12 @@
       System.SendFile.Linux
 
   if os(darwin) && !flag(portable)
-    cpp-options: -DOSX -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
-    other-modules:
-      System.SendFile,
-      System.SendFile.Darwin
+     cpp-options: -DHAS_UNIX_SOCKETS
+  -- if os(darwin) && !flag(portable)
+  --   cpp-options: -DOSX -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
+  --   other-modules:
+  --     System.SendFile,
+  --     System.SendFile.Darwin
 
   if os(freebsd) && !flag(portable)
     cpp-options: -DFREEBSD -DHAS_SENDFILE -DHAS_UNIX_SOCKETS
diff --git a/src/System/SendFile/Darwin.hsc b/src/System/SendFile/Darwin.hsc
deleted file mode 100644
--- a/src/System/SendFile/Darwin.hsc
+++ /dev/null
@@ -1,75 +0,0 @@
-{-# LANGUAGE BangPatterns             #-}
-{-# LANGUAGE CPP                      #-}
-{-# LANGUAGE ForeignFunctionInterface #-}
--- | Darwin system-dependent code for 'sendfile'.
-module System.SendFile.Darwin
-  ( sendFile
-  , sendFileImpl
-  , sendFileMode
-  ) where
-
-import           Control.Concurrent (threadWaitWrite)
-import           Data.Int
-import           Data.Word
-import           Foreign.C.Error    (throwErrnoIfMinus1RetryMayBlock_)
-#if __GLASGOW_HASKELL__ >= 703
-import           Foreign.C.Types    (CInt (CInt))
-#else
-import           Foreign.C.Types    (CInt)
-#endif
-import           Foreign.Marshal    (alloca)
-import           Foreign.Ptr        (Ptr, nullPtr)
-import           Foreign.Storable   (peek, poke)
-#if __GLASGOW_HASKELL__ >= 703
-import           System.Posix.Types (COff (COff), Fd (Fd))
-#else
-import           System.Posix.Types (COff, Fd)
-#endif
-
-------------------------------------------------------------------------------
-sendFile :: Fd -> Fd -> Word64 -> Word64 -> IO Int64
-sendFile = sendFileImpl c_sendfile threadWaitWrite
-{-# INLINE sendFile #-}
-
-
-------------------------------------------------------------------------------
-sendFileImpl :: (Fd -> Fd -> COff -> Ptr COff -> IO CInt)
-             -> (Fd -> IO ())
-             -> Fd -> Fd -> Word64 -> Word64 -> IO Int64
-sendFileImpl !rawSendFile !wait out_fd in_fd off count
-  | count == 0 = return 0
-  | otherwise  = alloca $ \pbytes -> do
-        poke pbytes $ fromIntegral count
-        sbytes <- sendfile rawSendFile wait out_fd in_fd (fromIntegral off)
-                           pbytes
-        return $ fromIntegral sbytes
-{-# INLINE sendFileImpl #-}
-
-
-------------------------------------------------------------------------------
-sendfile :: (Fd -> Fd -> COff -> Ptr COff -> IO CInt)
-         -> (Fd -> IO ())
-         -> Fd -> Fd -> COff -> Ptr COff -> IO COff
-sendfile rawSendFile wait out_fd in_fd off pbytes = do
-    throwErrnoIfMinus1RetryMayBlock_ "sendfile"
-                                     (rawSendFile out_fd in_fd off pbytes)
-                                     (wait out_fd)
-    peek pbytes
-{-# INLINE sendfile #-}
-
-------------------------------------------------------------------------------
--- in Darwin sendfile gives LFS support (no sendfile64 routine)
-foreign import ccall unsafe "sys/uio.h sendfile" c_sendfile_darwin
-    :: Fd -> Fd -> COff -> Ptr COff -> Ptr () -> CInt -> IO CInt
-
-
-------------------------------------------------------------------------------
-c_sendfile :: Fd -> Fd -> COff -> Ptr COff -> IO CInt
-c_sendfile out_fd in_fd off pbytes =
-    c_sendfile_darwin in_fd out_fd off pbytes nullPtr 0
-{-# INLINE c_sendfile #-}
-
-
-------------------------------------------------------------------------------
-sendFileMode :: String
-sendFileMode = "DARWIN_SENDFILE"