Tennis ball on log in screen

arty976 wrote:

The tennis ball pic suddenly replaced the sand dollar picture on my login screen. This occurred around the time I activated an iphone 6. Previous Q&A's about this topic are several years old and following the advice given then to change this picture are not working for me. I can change it for Apple ID but not under Users and Groups.

Should I be concerned about this sudden change in the login screen? How can I change it back?

I have macOS Monterey on my 2020 MacBook pro.

Thanks!

Change a user's login picture on Mac - Apple Support