Download QuickBooks for Mac 2014 Trial here: http://http-download.intuit.com/http.intuit/Downloads/2014/Latest/QuickBooksProMac2014Trial.dmg
Upgrade your data file to Quickbooks for Mac 2014
In QuickBooks for Mac 2014, choose QuickBooks > Check for QuickBooks Updates and update to the latest revision.After the update finishes – restart QuickBooks.  Choose File > Export To QuickBooks Online.