diff --git a/Library/Homebrew/os/mac/xcode.rb b/Library/Homebrew/os/mac/xcode.rb
index 8e51fc6b6d..e85f21c631 100644
--- a/Library/Homebrew/os/mac/xcode.rb
+++ b/Library/Homebrew/os/mac/xcode.rb
@@ -3,8 +3,9 @@ module OS
     module Xcode
       module_function
 
-      V4_BUNDLE_ID = "com.apple.dt.Xcode".freeze
-      V3_BUNDLE_ID = "com.apple.Xcode".freeze
+      DEFAULT_BUNDLE_PATH = Pathname.new("/Applications/Xcode.app").freeze
+      BUNDLE_ID = "com.apple.dt.Xcode".freeze
+      OLD_BUNDLE_ID = "com.apple.Xcode".freeze
 
       def latest_version
         case MacOS.version
@@ -51,9 +52,9 @@ module OS
           begin
             dir = MacOS.active_developer_dir
 
-            if dir.empty? || dir == CLT::MAVERICKS_PKG_PATH || !File.directory?(dir)
+            if dir.empty? || dir == CLT::PKG_PATH || !File.directory?(dir)
               path = bundle_path
-              path.join("Contents", "Developer") if path
+              path/"Contents/Developer" if path
             else
               # Use cleanpath to avoid pathological trailing slash
               Pathname.new(dir).cleanpath
@@ -67,11 +68,14 @@ module OS
         Pathname.new("#{prefix}/Toolchains/XcodeDefault.xctoolchain")
       end
 
-      # Ask Spotlight where Xcode is. If the user didn't install the
-      # helper tools and installed Xcode in a non-conventional place, this
-      # is our only option. See: https://superuser.com/questions/390757
       def bundle_path
-        MacOS.app_with_bundle_id(V4_BUNDLE_ID, V3_BUNDLE_ID)
+        # Use the default location if it exists.
+        return DEFAULT_BUNDLE_PATH if DEFAULT_BUNDLE_PATH.exist?
+
+        # Ask Spotlight where Xcode is. If the user didn't install the
+        # helper tools and installed Xcode in a non-conventional place, this
+        # is our only option. See: https://superuser.com/questions/390757
+        MacOS.app_with_bundle_id(BUNDLE_ID, OLD_BUNDLE_ID)
       end
 
       def installed?
@@ -182,7 +186,7 @@ module OS
       FROM_XCODE_PKG_ID = "com.apple.pkg.DeveloperToolsCLI".freeze
       MAVERICKS_PKG_ID = "com.apple.pkg.CLTools_Executables".freeze
       MAVERICKS_NEW_PKG_ID = "com.apple.pkg.CLTools_Base".freeze # obsolete
-      MAVERICKS_PKG_PATH = "/Library/Developer/CommandLineTools".freeze
+      PKG_PATH = "/Library/Developer/CommandLineTools".freeze
 
       # Returns true even if outdated tools are installed, e.g.
       # tools from Xcode 4.x on 10.9
@@ -237,7 +241,7 @@ module OS
         return false if MacOS.version < :lion
 
         if MacOS.version >= :mavericks
-          version = Utils.popen_read("#{MAVERICKS_PKG_PATH}/usr/bin/clang --version")
+          version = Utils.popen_read("#{PKG_PATH}/usr/bin/clang --version")
         else
           version = Utils.popen_read("/usr/bin/clang --version")
         end
@@ -261,7 +265,7 @@ module OS
 
         [MAVERICKS_PKG_ID, MAVERICKS_NEW_PKG_ID, STANDALONE_PKG_ID, FROM_XCODE_PKG_ID].find do |id|
           if MacOS.version >= :mavericks
-            next unless File.exist?("#{MAVERICKS_PKG_PATH}/usr/bin/clang")
+            next unless File.exist?("#{PKG_PATH}/usr/bin/clang")
           end
           version = MacOS.pkgutil_info(id)[/version: (.+)$/, 1]
           return version if version
diff --git a/Library/Homebrew/os/mac/xquartz.rb b/Library/Homebrew/os/mac/xquartz.rb
index 674e50c503..b82772faf7 100644
--- a/Library/Homebrew/os/mac/xquartz.rb
+++ b/Library/Homebrew/os/mac/xquartz.rb
@@ -5,6 +5,8 @@ module OS
     module XQuartz
       module_function
 
+      # TODO: confirm this path when you have internet
+      DEFAULT_BUNDLE_PATH = Pathname.new("Applications/Utilities/XQuartz.app").freeze
       FORGE_BUNDLE_ID = "org.macosforge.xquartz.X11".freeze
       APPLE_BUNDLE_ID = "org.x.X11".freeze
       FORGE_PKG_ID = "org.macosforge.xquartz.pkg".freeze
@@ -56,6 +58,11 @@ module OS
       end
 
       def bundle_path
+        # Use the default location if it exists.
+        return DEFAULT_BUNDLE_PATH if DEFAULT_BUNDLE_PATH.exist?
+
+        # Ask Spotlight where XQuartz is. If the user didn't install XQuartz
+        # in the conventional place, this is our only option.
         MacOS.app_with_bundle_id(FORGE_BUNDLE_ID, APPLE_BUNDLE_ID)
       end