@dave wondra @bellamydm
If you noticed, IntuitBrooks never provided any response to anyone using QBD 2020 or any older version. I believe that's a strong indication that they won't be releasing any patches for any of it. Consider immediately installing the trial version of QBD 2022 and/or 2023 and using the workaround to get it running on Sonoma. You may have time to consider the option of whether to purchase a new subscription license for QBD 2024 in October OR run a trial version of QB Desktop Windows for good on Parallels OR convert your data to QB Online or another cloud based accounting app.
