Good day, Katonk. 

Allow me to share some information about the system requirements for QuickBooks for Mac 2020.

As of now, we haven't received any reported issues from customers that use MacOS Ventura for QuickBooks for Mac 2020. Unless the product specifications clearly say that an operating system is supported, it hasn't been evaluated yet. We can't guarantee that your experience will be trouble-free.

Listed below are the minimum system requirements for QuickBooks for Mac 2020:

• 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.

You can check out this article for more details: System requirements for QuickBooks Desktop 2020 and Enterprise Solutions 20.0.

I've also included a link to learn more about the most recent QuickBooks for Mac 2020 update: Release notes for QuickBooks Desktop for Mac 2020.

Please leave a comment or post in the Community for follow-up questions or other concerns about QuickBooks for Mac. I'll be around if you need help. Have a wonderful day!