My QB  2019 for Mac started working on Sonoma 14.1 after Apple released that version. I have shut off my automatic Apple updates for now. The limited functions that I use: check writing, deposits, reconciling, balance sheets, and P & L statements have been working. As I was doing some year-end work the other day I tried to save a BS as a PDF to send out to others and I got the color wheel of death.  Luckily, I was able to close the company and then open it back up. I ended up saving the BS as an Excel file. I feel like I am sitting on a time bomb and especially if I update Sonoma any further I could be locked out of QB again. I don't feel safe not updating my OS long term because of all the potential hackers and viruses out there. Next week I am going to try some other software called Moneydance to replace QB 2019. Sadly it will require manually starting my companies all over again because there is no file transfer option between QB and Moneydance. Good luck and best wishes to all of the QB for Mac users out there.