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Resolution for Issue 'Are there any 3rd party utilities for QB 2013 that allow transfer of an account from one company to another? I’ve found several for PC but none for MAC' available: Yes (Solved).
Source: Intuit Community forum.

Are there any 3rd party utilities for QB 2013 that allow transfer of an account from one company to another? I’ve found several for PC but none for MAC: 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.

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