Photoshop opens but all menus are greyed out, everything is dead.

[chartnell]

Updated to 23.1.1 and the program opens but will not allow me to open any projects or start new ones. Using a Mac desktop with Big Sur operating system.

[Omar.Fathy]

In this page you can find this solution:
https://helpx.adobe.com/photoshop/kb/photoshop-and-macos-big-sur.html

And you can find more solutions for the known issues here:
https://helpx.adobe.com/photoshop/kb/known-issues.html