Crash issues under El Capitan are related to windows minimized when closing QB. Some users are having success deleting the QB .pref files. In the end your year version of QB is not supported on your OS.

Resolution for 'Crash issues issue: 'Cannot open my company file; Think .twg file was deleted. I can, however, create a new company file and open the sample files. File Doctor isn’t available for mac. Help?' available: Yes.

The Crash issues 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 Crash issues issue yourself by looking for a resolution described in the article. If it is a complex Crash issues issue or you are unable to solve the issue, you may contact us by clicking here or by using other Crash issues support options.

For more information about resolving issues related to Crash issues in Quickbooks/QBO or to get support for the issue 'Cannot open my company file; Think .twg file was deleted. I can, however, create a new company file and open the sample files. File Doctor isn’t available for mac. Help?', click the link below: