diff --git a/redo/objc_darwin.h b/redo/objc_darwin.h
index b1942de..a2cdc04 100644
--- a/redo/objc_darwin.h
+++ b/redo/objc_darwin.h
@@ -4,6 +4,9 @@
 #ifndef __GO_UI_OBJC_DARWIN_H__
 #define __GO_UI_OBJC_DARWIN_H__
 
+#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_7
+#define MAC_OS_X_VERSION_MAX_ALLOWED MAC_OS_X_VERSION_10_7
+
 #include <stdlib.h>
 #include <stdint.h>
 #include <objc/message.h>
diff --git a/redo/uitask_darwin.go b/redo/uitask_darwin.go
index eda0f29..9218c8e 100644
--- a/redo/uitask_darwin.go
+++ b/redo/uitask_darwin.go
@@ -6,8 +6,8 @@ import (
 	"unsafe"
 )
 
-// #cgo CFLAGS: -DTODO
-// #cgo LDFLAGS: -lobjc -framework Foundation -framework AppKit
+// #cgo CFLAGS: -mmacosx-version-min=10.7 -DMACOSX_DEPLOYMENT_TARGET=10.7
+// #cgo LDFLAGS: -mmacosx-version-min=10.7 -lobjc -framework Foundation -framework AppKit
 // #include "objc_darwin.h"
 import "C"