diff --git a/CMakeLists.txt b/CMakeLists.txt
index 09e123041..76a13a9ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -783,8 +783,8 @@ if(APPLE)
 
 	list(APPEND OC_BUNDLE_RESOURCES
 		src/res/Clonk.icns
-		src/res/C4D.icns src/res/C4F.icns src/res/C4G.icns src/res/C4K.icns
-		src/res/C4P.icns src/res/C4S.icns src/res/C4U.icns
+		src/res/ocd.icns src/res/ocf.icns src/res/ocg.icns
+		src/res/C4P.icns src/res/ocs.icns src/res/ocu.icns
 		src/res/MainMenu.xib
 		src/res/FullscreenWindow.xib
 		src/res/ConsoleGUIWindow.xib
diff --git a/src/res/C4D.icns b/src/res/C4D.icns
deleted file mode 100644
index 1d2c738b2..000000000
Binary files a/src/res/C4D.icns and /dev/null differ
diff --git a/src/res/C4F.icns b/src/res/C4F.icns
deleted file mode 100644
index 6c6ab5b44..000000000
Binary files a/src/res/C4F.icns and /dev/null differ
diff --git a/src/res/C4G.icns b/src/res/C4G.icns
deleted file mode 100644
index 77fd83665..000000000
Binary files a/src/res/C4G.icns and /dev/null differ
diff --git a/src/res/C4S.icns b/src/res/C4S.icns
deleted file mode 100644
index 5290c1af6..000000000
Binary files a/src/res/C4S.icns and /dev/null differ
diff --git a/src/res/C4U.icns b/src/res/C4U.icns
deleted file mode 100644
index 5eb3b12b6..000000000
Binary files a/src/res/C4U.icns and /dev/null differ
diff --git a/src/res/Info.plist b/src/res/Info.plist
index d352c5878..2e2ee17f3 100644
--- a/src/res/Info.plist
+++ b/src/res/Info.plist
@@ -9,30 +9,10 @@
 		<dict>
 			<key>CFBundleTypeExtensions</key>
 			<array>
-				<string>c4k</string>
+				<string>ocu</string>
 			</array>
 			<key>CFBundleTypeIconFile</key>
-			<string>C4K.icns</string>
-			<key>CFBundleTypeMIMETypes</key>
-			<array>
-				<string>application/octet-stream</string>
-			</array>
-			<key>CFBundleTypeName</key>
-			<string>Clonk Key</string>
-			<key>CFBundleTypeRole</key>
-			<string>Viewer</string>
-			<key>LSTypeIsPackage</key>
-			<false/>
-			<key>NSPersistentStoreTypeKey</key>
-			<string>Binary</string>
-		</dict>
-		<dict>
-			<key>CFBundleTypeExtensions</key>
-			<array>
-				<string>c4u</string>
-			</array>
-			<key>CFBundleTypeIconFile</key>
-			<string>C4U.icns</string>
+			<string>ocu.icns</string>
 			<key>CFBundleTypeMIMETypes</key>
 			<array>
 				<string>application/vnd.clonk.c4group</string>
@@ -49,16 +29,16 @@
 		<dict>
 			<key>CFBundleTypeExtensions</key>
 			<array>
-				<string>c4s</string>
+				<string>ocs</string>
 			</array>
 			<key>CFBundleTypeIconFile</key>
-			<string>C4S.icns</string>
+			<string>ocs.icns</string>
 			<key>CFBundleTypeMIMETypes</key>
 			<array>
 				<string>application/vnd.clonk.c4group</string>
 			</array>
 			<key>CFBundleTypeName</key>
-			<string>Clonk Scenario</string>
+			<string>OpenClonk Scenario</string>
 			<key>CFBundleTypeRole</key>
 			<string>Viewer</string>
 			<key>LSTypeIsPackage</key>
@@ -69,16 +49,16 @@
 		<dict>
 			<key>CFBundleTypeExtensions</key>
 			<array>
-				<string>c4d</string>
+				<string>ocd</string>
 			</array>
 			<key>CFBundleTypeIconFile</key>
-			<string>C4D.icns</string>
+			<string>ocd.icns</string>
 			<key>CFBundleTypeMIMETypes</key>
 			<array>
 				<string>application/vnd.clonk.c4group</string>
 			</array>
 			<key>CFBundleTypeName</key>
-			<string>Clonk Definition</string>
+			<string>OpenClonk Definition</string>
 			<key>CFBundleTypeRole</key>
 			<string>Viewer</string>
 			<key>LSTypeIsPackage</key>
@@ -89,16 +69,16 @@
 		<dict>
 			<key>CFBundleTypeExtensions</key>
 			<array>
-				<string>c4g</string>
+				<string>ocg</string>
 			</array>
 			<key>CFBundleTypeIconFile</key>
-			<string>C4G.icns</string>
+			<string>ocg.icns</string>
 			<key>CFBundleTypeMIMETypes</key>
 			<array>
 				<string>application/vnd.clonk.c4group</string>
 			</array>
 			<key>CFBundleTypeName</key>
-			<string>Clonk Group</string>
+			<string>OpenClonk Group</string>
 			<key>CFBundleTypeRole</key>
 			<string>Viewer</string>
 			<key>LSTypeIsPackage</key>
@@ -129,16 +109,16 @@
 		<dict>
 			<key>CFBundleTypeExtensions</key>
 			<array>
-				<string>c4f</string>
+				<string>ocf</string>
 			</array>
 			<key>CFBundleTypeIconFile</key>
-			<string>C4F.icns</string>
+			<string>ocf.icns</string>
 			<key>CFBundleTypeMIMETypes</key>
 			<array>
 				<string>application/vnd.clonk.c4group</string>
 			</array>
 			<key>CFBundleTypeName</key>
-			<string>Clonk Folder</string>
+			<string>OpenClonk Folder</string>
 			<key>CFBundleTypeRole</key>
 			<string>Viewer</string>
 			<key>LSTypeIsPackage</key>
diff --git a/src/res/ocd.icns b/src/res/ocd.icns
new file mode 100644
index 000000000..d001373ed
Binary files /dev/null and b/src/res/ocd.icns differ
diff --git a/src/res/ocf.icns b/src/res/ocf.icns
new file mode 100644
index 000000000..cbcd3585a
Binary files /dev/null and b/src/res/ocf.icns differ
diff --git a/src/res/ocg.icns b/src/res/ocg.icns
new file mode 100644
index 000000000..7da1631d7
Binary files /dev/null and b/src/res/ocg.icns differ
diff --git a/src/res/ocs.icns b/src/res/ocs.icns
new file mode 100644
index 000000000..37169ce20
Binary files /dev/null and b/src/res/ocs.icns differ
diff --git a/src/res/ocu.icns b/src/res/ocu.icns
new file mode 100644
index 000000000..ae863d9e3
Binary files /dev/null and b/src/res/ocu.icns differ