Hi @Jay Croyle
Please try following steps on image to refresh data the first time.
For more, please refer to: Import and shape data in Excel for Mac (Power Query)
If this step does not work, I suggest you clear credentials:
- Selecting Data > Get Data > Data Source Settings.
- In the Data Source Settings dialog box, select the connection you want.
- At the bottom, select Clear Permissions.
- Confirm this is what you want to do, and then select Delete.
Then re-enter the SharePoint credentials for a check.
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