My Mac is up to date and is operating with Big Sur.It is too old to upgrade but still getting security updates. It is fully up to date but still continues to search for updates. Nothing stops this.I have started in safe mode and rebooted but still searching despite being up to date. How do I stop this?
Please try resetting the NVRAM per the following link:
How to reset NVRAM on your Mac
However what I am seeing in your screenshot there is nothing wrong with the computer. If you would like us to look over what is installed to see if there are any issues please submit an EtreCheck report. Instructions are below.
It will help us get a good idea of what is causing your problem if you provide a report of your system, that way we do not have to play 20 questions with you. The report we are requesting does NOT provide any personal information and is extremely safe to use. Please navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.
When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again.
For instructions on how to download your EtreCheck report and attach it to your reply to this message please click How to use the Add Text Feature When Post… - Apple Community
Please try resetting the NVRAM per the following link:
How to reset NVRAM on your Mac
However what I am seeing in your screenshot there is nothing wrong with the computer. If you would like us to look over what is installed to see if there are any issues please submit an EtreCheck report. Instructions are below.
It will help us get a good idea of what is causing your problem if you provide a report of your system, that way we do not have to play 20 questions with you. The report we are requesting does NOT provide any personal information and is extremely safe to use. Please navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.
When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again.
For instructions on how to download your EtreCheck report and attach it to your reply to this message please click How to use the Add Text Feature When Post… - Apple Community
What year model is your iMac?
see > Identify your iMac model - Apple Support
Go to Apple > System Preference > Software Update and take a Command Shift 4 screenshot of the update panel,
see > Take a screenshot on your Mac - Apple Support
then post back here with the image using the ASC Image Insertion tool.
for example:
IMac continually searching for updates
