Article: Export data to a spreadsheet
To export to a .csv file, open the project, highlight the columns in the Task list, then use Ctrl+C to copy the data. You can then paste the data into a spreadsheet (e.g. Excel or Numbers) and save that file in a .csv format. This process also work from the Reports section.
Please note: If you do not highlight the columns and simply type Ctrl+C, when you paste the data into Excel or Numbers it will past all data from all possible columns in the application. This is a handy shortcut for gathering all data for your reporting purposes.