Hello, kwh2.
Let me share some steps to help you create a portable file for your version.
For QuickBooks Desktop for Mac, you can go to File > Utilities > Copy Company File for QuickBooks Mac. Please keep in mind that you have to use the same year version to restore the file. Otherwise, you may need to install the trial license of QuickBooks Desktop Mac and restore the file.
To learn more about the other features in your QuickBooks Desktop for Mac, please check out this guide: QuickBooks for Mac user's guide.
Feel free to reply to this thread if you have any additional questions or other concerns. I'll be right here to help. Take care always.