Best antivirus software

You can download Malwarebytes and have it take a look:

https://www.malwarebytes.com/mac-download

But as Jim said, it's not very likely that you actually have malware unless you've not been practicing "safe computing". If Malwarebytes doesn't turn up anything, post details as to what is happening with your Mac and someone can probably offer suggestions. My first one is that if you're still on macOS 15.1 as your profile indicates, update to the current version, macOS 15.2. That has a number of bug fixes and security updates.

Regards.

Your MacOS has anti-malware software built into it. There is no other recommended anti-virus app for the Mac.

These types of apps are unnecessary and often cause problems for the OS.

Keep your software updated and macOS is capable of keeping itself secure. There is no need to run any anti-virus, cleaners, optimizers or VPN apps. These apps often cause more problems and headache than they prevent because they conflict with the macOS’ built in securities. If you have this type of app installed, you should uninstall it according to the developer's instructions, and use best practices when using your Mac.

If you want to keep your Mac secure, follow this guidance:

• Keep your macOS and other software up to date.

• Don’t click links in email.

• Don’t download apps from unknown websites.

• Don’t disable your Mac’s built in security.

For more info, please see these support documents:

• Effective Defenses Against Malware - Apple Community

• Avoid phishing emails, fake 'virus' alerts…and other scams - Apple Support

Protecting against malware in macOS - Apple Support

macOS - Security - Apple

No, there is not any recommended AntiVirus software. Most will continue to run on your computer, slowing it down without providing any benefit. Removal is also difficult as they will want to remain on your computer forever.

It would be best to describe what you are experiencing and we will be able to help with how to proceed. Screenshots are helpful to visualize what you are seeing.

Download and run for free malwarebytes for mac https://www.malwarebytes.com/?x-clickref=1101lA8btBob&gad_source=1&gbraid=0AAAAACpudpTkVPO60ChaFVC6E6AjYSAKJ&gclid=Cj0KCQiA7se8BhCAARIsAKnF3rx7AbGaZa0qxYo1SHgioV85lpu3VWQ04sIN4MMA3DQ3HvVzSGhXznQaAlFhEALw_wcB

You don't need the premium version; the free version will suit your needs

Malwarebytes searches for malware; normally, you don't need any antivirus-software.