View in HD at http://macmost.com/e-1716. Many people share Numbers spreadsheets with others by exporting to Excel. This creates a cumbersome process where the spreadsheet is exported and imported multiple times and rules out using some of the best features of Numbers. But you can use the Collaborate feature to share a document with another users regardless of whether they are on Mac or Windows and what software they have installed or whether they have an iCloud account. You can password-protect the document and even collaborate in real time.