You don't need to purchase QuickBooks Desktop, charletonc.

When converting from QuickBooks Online to QuickBooks for Mac, you'll need to use a Windows company file. Instead of purchasing QuickBooks Desktop, you can use our sample file.

Just a heads up, your QuickBooks Desktop file must be the same version of QuickBooks Desktop for Mac.

Then, export your QuickBooks Online data to Desktop.

Afterward, you're good to convert the Windows file to QuickBooks Desktop for Mac.

Feel free to tag my name in your Reply if you still need my help!