diff --git a/pkg/pidfile/pidfile_darwin.go b/pkg/pidfile/pidfile_darwin.go
new file mode 100644
index 0000000000000000000000000000000000000000..5c1cd7ab854df8a014cbab1d331ccb6204666c13
--- /dev/null
+++ b/pkg/pidfile/pidfile_darwin.go
@@ -0,0 +1,18 @@
+// +build darwin
+
+package pidfile
+
+import (
+	"syscall"
+)
+
+func processExists(pid int) bool {
+	// OS X does not have a proc filesystem.
+	// Use kill -0 pid to judge if the process exists.
+	err := syscall.Kill(pid, 0)
+	if err != nil {
+		return false
+	}
+
+	return true
+}
diff --git a/pkg/pidfile/pidfile_unix.go b/pkg/pidfile/pidfile_unix.go
index 28f3deca9191f6fb07a701e50c7f307255438ecf..1bf5221e3b64748846794cc4609179c84732156f 100644
--- a/pkg/pidfile/pidfile_unix.go
+++ b/pkg/pidfile/pidfile_unix.go
@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows,!darwin
 
 package pidfile