Welcome to the Community, @laura162.
When you import data into QuickBooks for Mac, the error message can be because the company file name includes special characters ( / \ < > ! $).
If your company file has no special character, yet you received the error, you can check to identify whether your company file is compromised.
I'm also adding this article as your reference in importing data into QuickBooks for Mac: Import data into QuickBooks for Mac.
Furthermore, you can find resources about using QuickBooks for Mac here: QuickBooks Desktop for Mac User's Guide.
Let me know if you have additional questions about importing data into QuickBooks for Mac. I'm always here to help. Have a great day.
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