PC
1) Operating System: Windows XP or higher
2) Word: Office 2007 or higher (except Office Starter edition,) or Word 2007 or higher
3) Outlook: Office 2007 or higher (except Office Home and Student edition and Starter edition,) or Outlook 2007 or higher
4) Note: StyleGuard does not support Office 2003
Mac
1) Operating System: OS X 10.6.8 or above (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lion), 10.9 (Mavericks), 10.10 (Yosemite), 10.11 (El Capitan), 10.12 (Sierra) and 10.13 (High Sierra)
2) Office: Office for Mac 2011 and 2016