We no longer have offline versions, @Cre8Dsgn. Let me share some information about it while I provide the available ones.
If you upgraded or updated the OS version, your Desktop Mac 2016 will no longer work. It also needs to connect to a server for product activation or register. However, this is already unsupported.
Moreover, the one-time license is unavailable starting in 2022 as we transition to a subscription-based model. The last edition we released with a license fee was QuickBooks Desktop 2021. Therefore, QuickBooks Desktop editions need an internet connection to function effectively.
Furthermore, consider exploring recent versions like QuickBooks Desktop (QBDT) 2024, you'll want to know what your computer needs for the best experience. Here's an article for the complete info: System requirements for QuickBooks Desktop 2024.
You can check out this guide to learn how to download the latest QuickBooks Desktop with your subscription: Manage your QuickBooks Desktop subscriptions and services
I'm glad to have provided all the information. Please comment below for any other questions about QuickBooks. Take care.