The Mac users often use the Entourage application for managing their emails and contacts but entourage i/o error can make the application out of order. You can not receive any mails or send any which is a big problem mainly for the people that are using it for official purpose. The cause of this error can be any corruption in the entourage database that is responsible for storing all that data items of the application like the mails, contacts, calender entries, journals, notes etc. The entourage i/o error can be resolved by using the inbuilt repair tool of the entourage but on some occasion it can not be fixed then you may have to create a new database. The corruption might have been caused because the application was closed abruptly or there is any spam email in the database that is causing the trouble. Now to create the database you have to reinstall the application on Mac which will fix entourage i/o error. The lost data can be then recovered from the entourage recovery software which can recover all your mails, lost contacts and data items of the application and it can be used as earlier with all data intact. So download the software and get lost Mac data.