Allow me to jump in and clear up the confusion, @DanLA. I want to ensure you're able to work on your version of QuickBooks for Mac 2020.

Updating your app to the most recent version ensures better security and performance. You'll also get the latest features and fixes. By making sure your computer meets the requirements listed below, you can experience the best out of the QuickBooks app.

• R12 and earlier - At least macOS 10.14 (Mojave); supported by macOS 10.14 (Mojave).
• R13 and later - At least macOS 10.15 (Catalina); supported by macOS 10.15 (Catalina) and later.
• Intel processor, Core 2 Duo or higher.
• Multi-user Server: Intel Core 2 Duo or higher processor to run a server.
• 2 GB RAM (4 GB RAM recommended).
• 250 MB of available disk space.
• CD/DVD drive or Internet connection for downloaded installation.
• Printer: 100% Macintosh-compatible printer, if you plan to print invoices, checks, deposit slips, lists, purchase orders, mailing labels, reports, or graphs.
• Checks: Use Intuit Checks if you plan to print checks. Canadian Image Ready Checks are not supported.
• Product registration required.

Before downloading the updates, secure a back-up copy of your company file. By doing so, you’ll always have intact data to use in the event you encounter errors during the process.

Stay in touch if you need further assistance with downloading and installing updates. The Community is always here to help. Have a wonderful day!