Hi pngrini,
In addition to Lexiesmemerea's post. QuickBooks for Mac 2019 has a new product enhancement called iCloud document sharing.
To understand how and how not to use iCloud Document Sharing, you'll want to check out this article: ICloud Document Sharing and QuickBooks Desktop for Mac 2019.
Always swing by anytime if you have further questions. We're here to help you.
