1952dancer wrote:
We have had Norton for years and it has worked well.
"Worked well," how? What could it have possibly blocked? All known malware is already blocked by macOS.
It will now not fix a security issue on our iMac.
What "security issue" has it made up for you to feel good about it doing something?
In addition, twice in the past month and a half our system has reverted to the original Ventura that came on the iMac last year and I have had to reinstall everything.
macOS does not do that. It would take massive intervention by the user to remove and revert any previous macOS version.
In order to revert to a previous macOS version, you must startup in Internet Recovery or another startup source, erase the drive, then reinstall from an older macOS version installer. From internet recovery, it can install the original shipping macOS version if you erase the drive completely. It doesn't just magically install a previous version.
Is it possible that these issues are connected?
Yes, having Norton installed and having unexplainable problems with your Mac are quite common.