diff --git a/libraries/command_line_tools.rb b/libraries/command_line_tools.rb
index 7c9ac9fd..56e9fab8 100644
--- a/libraries/command_line_tools.rb
+++ b/libraries/command_line_tools.rb
@@ -64,7 +64,7 @@ def xcode_version(product)
     end
 
     def macos_version
-      shell_out(['/usr/bin/sw_vers', '-productVersion']).stdout.chomp[/[\d][\d]\.\d+/]
+      shell_out(['/usr/bin/sw_vers', '-productVersion']).stdout.chomp[/[\d][\d]\.\d+(?:\.\d+)?/]
     end
 
     def softwareupdate_list