The changes will be made when your Mac is back online. There is a Google Drive app you can download onto Mac so you can work offline.
Just visit the web-based app from your browser and you can create word processor documents, spreadsheets, and presentations. If you have a Gmail account, or a Google Hangouts account, or a YouTube account, you have Google Docs. Google Docs is the easiest replacement for Microsoft office because it's so accessible.
