I have borrowed an old Macbook and cannot open Numbers files on it. I have tried downloading Open Office but that will not open them. Is there anything you can think of which might help? The Macbook is pretty old (10.5.8) and I've read it is not always good idea to update it so that I can download Numbers. Also this is just for 2 weeks while away so I just need to be able to open these spreadsheets for now. Even if I could just see them as 'view only' it would be enough. Thanks.