diff --git a/stack/tun/stack.go b/stack/tun/stack.go
index 7d74bea..2a081a4 100644
--- a/stack/tun/stack.go
+++ b/stack/tun/stack.go
@@ -66,7 +66,6 @@ func (s *Stack) Run() {
 				return
 			} else {
 				log.Printf("Error occurred while reading from TUN stack: %v", err)
-				// TODO graceful shutdown
 				panic(err)
 			}
 		}
diff --git a/stack/tun/stack_darwin.go b/stack/tun/stack_darwin.go
index a748a01..4b70581 100644
--- a/stack/tun/stack_darwin.go
+++ b/stack/tun/stack_darwin.go
@@ -120,7 +120,7 @@ func NewStack(easyConnectClient *client.EasyConnectClient, dnsHijack bool) (*Sta
 	log.Printf("Interface Name: %s, index %d\n", tunName, netIfce.Index)
 
 	// We need this dialer to bind to device otherwise packets will not be sent via TUN
-	// Doesn't work on macos. See  https://github.com/Mythologyli/zju-connect/pull/44#issuecomment-1784050022
+	// Doesn't work on macOS. See  https://github.com/Mythologyli/zju-connect/pull/44#issuecomment-1784050022
 	s.endpoint.tcpDialer = &net.Dialer{
 		LocalAddr: &net.TCPAddr{
 			IP:   s.endpoint.ip,
@@ -135,7 +135,7 @@ func NewStack(easyConnectClient *client.EasyConnectClient, dnsHijack bool) (*Sta
 		},
 	}
 
-	// Doesn't work on macos. See  https://github.com/Mythologyli/zju-connect/pull/44#issuecomment-1784050022
+	// Doesn't work on macOS. See  https://github.com/Mythologyli/zju-connect/pull/44#issuecomment-1784050022
 	s.endpoint.udpDialer = &net.Dialer{
 		LocalAddr: &net.UDPAddr{
 			IP:   s.endpoint.ip,