QB Issue Resolution:

Hold down the option key when launching QuickBooks to open the application without opening a company file. Then open the Sample Product company, which is listed among the choices. You should be able to work in this file without problems. If you do encounter problems, the issue is likely an incompatibility with QuickBooks Mac 2011 and the OS version you are using or other drivers and extensions.

If the sample product company works fine, then the issue is likely with your company file. Go ahead and try to open your company file. If it does not open then there is some serious issue – like an underlying disk problem. Do you have a recent back up of the file? That may be the best solution.

If the file opens ok, your File->Utilities->Rebuild. This can fix many sources of file corruption.

Alternate Solution:

http://quickbooksrepairpro.com/Database-disk-image-is-malformed.aspx

Resolution for Issue 'How open the program that shows corrupted and malformed? How to fix it?' available: Yes (Solved).
Source: Intuit Community forum.

How open the program that shows corrupted and malformed? How to fix it?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Data Corruption
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Error Recovery for Data Corruption [Canada]
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