diff --git a/macOS/CamelStudioX.xcworkspace/xcuserdata/daizhirui.xcuserdatad/UserInterfaceState.xcuserstate b/macOS/CamelStudioX.xcworkspace/xcuserdata/daizhirui.xcuserdatad/UserInterfaceState.xcuserstate
index 42fbf05..22f9b67 100644
Binary files a/macOS/CamelStudioX.xcworkspace/xcuserdata/daizhirui.xcuserdatad/UserInterfaceState.xcuserstate and b/macOS/CamelStudioX.xcworkspace/xcuserdata/daizhirui.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/macOS/appcast.xml b/macOS/appcast.xml
new file mode 100644
index 0000000..8ef4993
--- /dev/null
+++ b/macOS/appcast.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" standalone="yes"?><rss xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" version="2.0">
+<channel>
+<title>CamelStudioX</title>
+<item>
+<title>4.0</title>
+<pubDate>Thu, 18 Oct 2018 10:39:54 +0800</pubDate>
+<sparkle:minimumSystemVersion>10.12.2</sparkle:minimumSystemVersion>
+<enclosure url="https://raw.githubusercontent.com/daizhirui/CamelStudioX/master/macOS/CamelStudioX_4.0.0_Build50.zip" sparkle:version="50" sparkle:shortVersionString="4.0.0" length="80281288" type="application/octet-stream" sparkle:dsaSignature="MC0CFQC8Isovo/wdcUXIVN9GCf7Ar98fwQIUH6WAF1NHC2cINcDBAEFs9GQzJrY="/>
+</item>
+</channel></rss>