QB Issue Resolution:

QuickBooks Mac can only import Quicken Mac 2007 data files. These have the file extension .qdfm

Even then, I don’t recommend importing Quicken files, as Quicken isn’t a double entry accounting system and the resulting imports tend to be more trouble than they are worth. Better to pick a date to start your company records new in QuickBooks.

Resolution for Issue 'I am trying to convert a Quicken .QDF file and it won’t work' available: Yes (Solved).
Source: Intuit Community forum.

I am trying to convert a Quicken .QDF file and it won’t work: 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 QDF
Quickbooks Repair Pro will resolve it efficiently and affordably. Guaranteed resolution of your issue, or you pay nothing!

Error Recovery for QDF [Canada]
E-Tech is the #1 Quickbooks data migration and Conversion service provider.

Get 50% off Quickbooks Online

Click Here for 50% off!

Additional Support Options: