diff --git a/ZeroTier One/AboutViewController.h b/ZeroTier One/AboutViewController.h
index 4260419e8..d3d5bc14e 100644
--- a/ZeroTier One/AboutViewController.h	
+++ b/ZeroTier One/AboutViewController.h	
@@ -1,10 +1,20 @@
-//
-//  AboutViewController.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Cocoa/Cocoa.h>
 #import <WebKit/WebKit.h>
diff --git a/ZeroTier One/AboutViewController.m b/ZeroTier One/AboutViewController.m
index c0b6ec859..21dceae16 100644
--- a/ZeroTier One/AboutViewController.m	
+++ b/ZeroTier One/AboutViewController.m	
@@ -1,10 +1,20 @@
-//
-//  AboutViewController.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "AboutViewController.h"
 
diff --git a/ZeroTier One/AppDelegate.h b/ZeroTier One/AppDelegate.h
index df66c17d8..a00cfba9d 100644
--- a/ZeroTier One/AppDelegate.h	
+++ b/ZeroTier One/AppDelegate.h	
@@ -1,10 +1,20 @@
-//
-//  AppDelegate.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ZeroTier One/AppDelegate.m b/ZeroTier One/AppDelegate.m
index b1d8cce25..5da6b3549 100644
--- a/ZeroTier One/AppDelegate.m	
+++ b/ZeroTier One/AppDelegate.m	
@@ -1,10 +1,20 @@
-//
-//  AppDelegate.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "AppDelegate.h"
 #import "NetworkMonitor.h"
diff --git a/ZeroTier One/AuthtokenCopy.h b/ZeroTier One/AuthtokenCopy.h
index 43c927e25..f0497cc6d 100644
--- a/ZeroTier One/AuthtokenCopy.h	
+++ b/ZeroTier One/AuthtokenCopy.h	
@@ -1,10 +1,20 @@
-//
-//  AuthtokenCopy.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 5/31/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #ifndef AuthtokenCopy_h
 #define AuthtokenCopy_h
diff --git a/ZeroTier One/AuthtokenCopy.m b/ZeroTier One/AuthtokenCopy.m
index 893d90cf9..a10350f7b 100644
--- a/ZeroTier One/AuthtokenCopy.m	
+++ b/ZeroTier One/AuthtokenCopy.m	
@@ -1,10 +1,20 @@
-//
-//  AuthtokenCopy.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 5/31/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Foundation/Foundation.h>
 
@@ -84,4 +94,4 @@ NSString* getAdminAuthToken(AuthorizationRef authRef) {
     }
 
     return @"";
-}
\ No newline at end of file
+}
diff --git a/ZeroTier One/JoinNetworkViewController.h b/ZeroTier One/JoinNetworkViewController.h
index a928d046c..428959fba 100644
--- a/ZeroTier One/JoinNetworkViewController.h	
+++ b/ZeroTier One/JoinNetworkViewController.h	
@@ -1,10 +1,20 @@
-//
-//  JoinNetworkViewController.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ZeroTier One/JoinNetworkViewController.m b/ZeroTier One/JoinNetworkViewController.m
index abe8f9597..cae265416 100644
--- a/ZeroTier One/JoinNetworkViewController.m	
+++ b/ZeroTier One/JoinNetworkViewController.m	
@@ -1,10 +1,20 @@
-//
-//  JoinNetworkViewController.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "JoinNetworkViewController.h"
 #import "ServiceCom.h"
diff --git a/ZeroTier One/Network.h b/ZeroTier One/Network.h
index f8d0deb4b..0f3c49643 100644
--- a/ZeroTier One/Network.h	
+++ b/ZeroTier One/Network.h	
@@ -1,10 +1,20 @@
-//
-//  Network.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/4/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Foundation/Foundation.h>
 
diff --git a/ZeroTier One/Network.m b/ZeroTier One/Network.m
index 30b3f884d..16efc6e32 100644
--- a/ZeroTier One/Network.m	
+++ b/ZeroTier One/Network.m	
@@ -1,10 +1,20 @@
-//
-//  Network.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/4/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "Network.h"
 
diff --git a/ZeroTier One/NetworkInfoCell.h b/ZeroTier One/NetworkInfoCell.h
index b687bc4fc..be9345d70 100644
--- a/ZeroTier One/NetworkInfoCell.h	
+++ b/ZeroTier One/NetworkInfoCell.h	
@@ -1,10 +1,20 @@
-//
-//  NetworkInfoCell.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ZeroTier One/NetworkInfoCell.m b/ZeroTier One/NetworkInfoCell.m
index b37fa8a8f..dc75cab39 100644
--- a/ZeroTier One/NetworkInfoCell.m	
+++ b/ZeroTier One/NetworkInfoCell.m	
@@ -1,10 +1,20 @@
-//
-//  NetworkInfoCell.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "NetworkInfoCell.h"
 #import "ServiceCom.h"
diff --git a/ZeroTier One/NetworkMonitor.h b/ZeroTier One/NetworkMonitor.h
index 0bd94814f..8cdec4ed6 100644
--- a/ZeroTier One/NetworkMonitor.h	
+++ b/ZeroTier One/NetworkMonitor.h	
@@ -1,10 +1,20 @@
-//
-//  NetworkMonitor.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Foundation/Foundation.h>
 
diff --git a/ZeroTier One/NetworkMonitor.m b/ZeroTier One/NetworkMonitor.m
index e219e7629..7ed22c4a9 100644
--- a/ZeroTier One/NetworkMonitor.m	
+++ b/ZeroTier One/NetworkMonitor.m	
@@ -1,10 +1,20 @@
-//
-//  NetworkMonitor.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "NetworkMonitor.h"
 #import "Network.h"
@@ -240,4 +250,4 @@ NSString * const StatusUpdateKey = @"com.zerotier.one.status";
     }
 }
 
-@end
\ No newline at end of file
+@end
diff --git a/ZeroTier One/NodeStatus.h b/ZeroTier One/NodeStatus.h
index 074928b41..eab5bfe44 100644
--- a/ZeroTier One/NodeStatus.h	
+++ b/ZeroTier One/NodeStatus.h	
@@ -1,10 +1,20 @@
-//
-//  NodeStatus.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/4/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Foundation/Foundation.h>
 
diff --git a/ZeroTier One/NodeStatus.m b/ZeroTier One/NodeStatus.m
index 5a3684919..3bae3c7da 100644
--- a/ZeroTier One/NodeStatus.m	
+++ b/ZeroTier One/NodeStatus.m	
@@ -1,11 +1,20 @@
-//
-//  NodeStatus.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/4/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
-
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #import "NodeStatus.h"
 
 @implementation NodeStatus
diff --git a/ZeroTier One/PreferencesViewController.h b/ZeroTier One/PreferencesViewController.h
index e9e4e4b13..56d0fdb82 100644
--- a/ZeroTier One/PreferencesViewController.h	
+++ b/ZeroTier One/PreferencesViewController.h	
@@ -1,10 +1,20 @@
-//
-//  PreferencesViewController.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ZeroTier One/PreferencesViewController.m b/ZeroTier One/PreferencesViewController.m
index 2292367d4..13927fbaf 100644
--- a/ZeroTier One/PreferencesViewController.m	
+++ b/ZeroTier One/PreferencesViewController.m	
@@ -1,10 +1,20 @@
-//
-//  PreferencesViewController.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "PreferencesViewController.h"
 
diff --git a/ZeroTier One/ServiceCom.h b/ZeroTier One/ServiceCom.h
index b7ef8ddac..74ab2b350 100644
--- a/ZeroTier One/ServiceCom.h	
+++ b/ZeroTier One/ServiceCom.h	
@@ -1,10 +1,20 @@
-//
-//  ServiceCom.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/4/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Foundation/Foundation.h>
 
diff --git a/ZeroTier One/ServiceCom.m b/ZeroTier One/ServiceCom.m
index 7c1b38be6..4982d40e7 100644
--- a/ZeroTier One/ServiceCom.m	
+++ b/ZeroTier One/ServiceCom.m	
@@ -1,10 +1,20 @@
-//
-//  ServiceCom.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/4/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "ServiceCom.h"
 #import "AuthtokenCopy.h"
diff --git a/ZeroTier One/ShowNetworksViewController.h b/ZeroTier One/ShowNetworksViewController.h
index 5722d3f46..5c251674d 100644
--- a/ZeroTier One/ShowNetworksViewController.h	
+++ b/ZeroTier One/ShowNetworksViewController.h	
@@ -1,10 +1,20 @@
-//
-//  ShowNetworksViewController.h
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ZeroTier One/ShowNetworksViewController.m b/ZeroTier One/ShowNetworksViewController.m
index 64e061972..e3a1e52c1 100644
--- a/ZeroTier One/ShowNetworksViewController.m	
+++ b/ZeroTier One/ShowNetworksViewController.m	
@@ -1,10 +1,20 @@
-//
-//  ShowNetworksViewController.m
-//  ZeroTier One
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import "ShowNetworksViewController.h"
 #import "NetworkMonitor.h"
diff --git a/ZeroTier One/main.m b/ZeroTier One/main.m
index 399c483d4..108a6bd18 100644
--- a/ZeroTier One/main.m	
+++ b/ZeroTier One/main.m	
@@ -1,10 +1,20 @@
-//
-//  main.m
-//  testapp
-//
-//  Created by Grant Limberg on 8/7/16.
-//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
-//
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #import <Cocoa/Cocoa.h>