What factors trigger the above-mentioned error symptoms? The common reasons which may result in corruption of Outlook 2011 Data file are: Mac system terminates after a time-period.Error messages on the screen with error description and probable resolution.File not found as users are unable to locate data file.“Access denied” message pops-up and emails are not accessible.Applications freeze or crash repeatedly without intimation.To avoid losing email data, opt to rebuild Outlook 2011 for Mac which will not only help in resolving the current error “application failed to start” but also help in retrieving valuable database.īefore acquainting with the methodology, let’s have a look at the probable symptoms when Outlook for Mac stops responding as per expectations: Secondly, Outlook for Mac doesn’t allow OLM file to open on other email clients or operating systems, apart from Mac, thus ruling out the option of backup on other systems. If this error hits your system, means Outlook 2011 for Mac is inaccessible and the application needs to be re-installed, but the problem is if you try to re-install the application, you might end-up losing previous data. Re-installing the application may fix this problem”. Error – “This application failed to start because OLM.DLL not found.