Thanks for your help.  But I still do not see how to buy Desktop for Mac when I click on the link.

 I realize Intuit wants everyone to switch to online, and they are making it very hard to purchase the updated Desktop.  Although the last I contacted QB, they had discontinued Desktop.   Which they also did a few years ago but many of us protested and it became available again as Desktop

Is this what is happening again?

Or, another alternative, can I still use QB 2020 for Mac when I upgrade to Sonoma, or will it not work?