diff --git a/gpxsee.pro b/gpxsee.pro
index 2e14b41d..dce86427 100644
--- a/gpxsee.pro
+++ b/gpxsee.pro
@@ -375,7 +375,8 @@ macx {
         icons/formats/wpt.icns \
         icons/formats/loc.icns \
         icons/formats/slf.icns \
-        icons/formats/json.icns
+        icons/formats/json.icns \
+        icons/formats/cup.icns
     QMAKE_BUNDLE_DATA += locale maps icons csv
 }
 
diff --git a/icons/formats/cup.icns b/icons/formats/cup.icns
new file mode 100644
index 00000000..26b817ee
Binary files /dev/null and b/icons/formats/cup.icns differ
diff --git a/pkg/Info.plist b/pkg/Info.plist
index c6534713..4af5f5de 100644
--- a/pkg/Info.plist
+++ b/pkg/Info.plist
@@ -211,6 +211,22 @@
 			<key>CFBundleTypeRole</key>
 			<string>Viewer</string>
 		</dict>
+		<dict>
+			<key>CFBundleTypeExtensions</key>
+			<array>
+				<string>cup</string>
+			</array>
+			<key>CFBundleTypeMIMETypes</key>
+			<array>
+				<string>application/vnd.naviter.seeyou.cup</string>
+			</array>
+			<key>CFBundleTypeIconFile</key>
+			<string>icons/cup.icns</string>
+			<key>CFBundleTypeName</key>
+			<string>SeeYou CUP File</string>
+			<key>CFBundleTypeRole</key>
+			<string>Viewer</string>
+		</dict>
 	</array>
 
 	<key>UTImportedTypeDeclarations</key>
@@ -467,6 +483,27 @@
 				<string>application/geo+json</string>
 			</dict>
 		</dict>
+		<dict>
+			<key>UTTypeIdentifier</key>
+			<string>com.naviter.seeyou.cup</string>
+			<key>UTTypeReferenceURL</key>
+			<string>http://www.naviter.com</string>
+			<key>UTTypeDescription</key>
+			<string>SeeYou CUP File</string>
+			<key>UTTypeConformsTo</key>
+			<array>
+				<string>public.data</string>
+			</array>
+			<key>UTTypeTagSpecification</key>
+			<dict>
+				<key>public.filename-extension</key>
+				<array>
+					<string>cup</string>
+				</array>
+				<key>public.mime-type</key>
+				<string>application/vnd.naviter.seeyou.cup</string>
+			</dict>
+		</dict>
 	</array>
 </dict>
 </plist>