We've created an App to enable you to export your QuickBooks Online data to either QuickBooks Windows or QuickBooks Mac.  Go to apps.intuit.com and search for ExportMyBooks.

Currently we are running it free of charge in order to build up reviews. If you need any assistance just reply here on the thread and I'll help you out. 

Safety of your data is our primary concern. No Apps in the Intuit App Store (including our own) receive PII information from your company (SSN, Credit Cards, and other encrypted information). Listing in the app store requires going through Intuit’s extensive vetting process and continuing reviews. All company file data in our system is automatically deleted after 30 days.

You can read more about the Intuit app store data access rules here: https://appcenter.intuit.com/cmsimages/promo/intuit_app_data_sharing/dynamicDataSharing/DataSharingF...