Thanks for clarifying things out, Yagabu.

The setup that you're looking for isn't an option in QuickBooks Desktop for Mac. You might want to use QuickBooks Online (QBO) instead. 

QBO is a cloud-based software where multiple users can access up-to-date information simultaneously. 

To help you get started, we’ve created a test drive account, so you can experience some of the features and functionality in QBO: Test drive QuickBooks Online.

You can also check this article that will help you get a better idea about QBO: Getting started with QuickBooks Online.

If you have any other concerns, please don't hesitate to visit us again. We're always here to help.