diff --git a/Squirrel.xcodeproj/project.pbxproj b/Squirrel.xcodeproj/project.pbxproj
index 08e633795..15e8a6ac9 100644
--- a/Squirrel.xcodeproj/project.pbxproj
+++ b/Squirrel.xcodeproj/project.pbxproj
@@ -590,6 +590,7 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CODE_SIGN_ENTITLEMENTS = resources/Squirrel.entitlements;
 				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 1.0.0;
@@ -645,6 +646,7 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CODE_SIGN_ENTITLEMENTS = resources/Squirrel.entitlements;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 1.0.0;
 				DEAD_CODE_STRIPPING = YES;
diff --git a/resources/Squirrel.entitlements b/resources/Squirrel.entitlements
index a69efddb0..b86f7f3d5 100644
--- a/resources/Squirrel.entitlements
+++ b/resources/Squirrel.entitlements
@@ -2,32 +2,11 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>com.apple.security.temporary-exception.shared-preference.read-write</key>
-	<true/>
-	<key>com.apple.security.temporary-exception.files.absolute-path.read-write</key>
-	<array>
-		<string>/Library/Input Methods/Squirrel.app</string>
-	</array>
-	<key>com.apple.security.temporary-exception.files.absolute-path.read-only</key>
-	<array>
-		<string>/usr/bin/say</string>
-	</array>
-	<key>com.apple.security.temporary-exception.files.home-relative-path.read-write</key>
-	<array>
-		<string>/Library/Rime/</string>
-	</array>
-	<key>com.apple.security.files.bookmarks.app-scope</key>
+	<key>com.apple.security.cs.disable-library-validation</key>
 	<true/>
 	<key>com.apple.security.app-sandbox</key>
-	<true/>
-	<key>com.apple.security.files.user-selected.read-write</key>
-	<true/>
+	<false/>
 	<key>com.apple.security.network.client</key>
 	<true/>
-	<key>com.apple.security.temporary-exception.mach-lookup.global-name</key>
-	<array>
-		<string>$(PRODUCT_BUNDLE_IDENTIFIER)-spks</string>
-		<string>$(PRODUCT_BUNDLE_IDENTIFIER)-spki</string>
-	</array>
 </dict>
 </plist>
diff --git a/sources/Main.swift b/sources/Main.swift
index 4e019f144..22dfe6291 100644
--- a/sources/Main.swift
+++ b/sources/Main.swift
@@ -125,32 +125,11 @@ struct SquirrelApp {
       // finally run everything
       app.run()
       print("Squirrel is quitting...")
-      cleanupOldFiles(olderThan: 5)
       rimeAPI.finalize()
     }
     return
   }
   
-  static func cleanupOldFiles(olderThan days: Int) {
-    let fileManager = FileManager.default
-    let currentDate = Date()
-    let calendar = Calendar.current
-    
-    do {
-      let fileURLs = try fileManager.contentsOfDirectory(at: fileManager.temporaryDirectory, includingPropertiesForKeys: [.creationDateKey], options: .skipsHiddenFiles)
-      for fileURL in fileURLs {
-        if let creationDate = try fileURL.resourceValues(forKeys: [.creationDateKey]).creationDate {
-          if let daysDifference = calendar.dateComponents([.day], from: creationDate, to: currentDate).day, daysDifference > days {
-            try fileManager.removeItem(at: fileURL)
-            // print("Deleted: \(fileURL.path)")
-          }
-        }
-      }
-    } catch {
-      print("Error: \(error.localizedDescription)")
-    }
-  }
-  
   static let helpDoc = """
 Supported arguments:
 Perform actions: