Malwarebytes Antivirus for Mac (2024) scans & removes viruses, adware, ransomware & other Mac malware. The Mac antivirus protects you & your mac so it keeps running.
www.malwarebytes.com
Also check for malicious profiles. Basically no one uses them. So, if one is there you did not purposefully create. Get rid of it. If you don't see a profiles option. You have no profiles.
Many different kinds of malware can make changes to the Mac system that Malwarebytes cannot fix, such as malicious changes to browser settings, and the addition of malicious system profiles. Malwar...
velocity is RIGHT about MalwareBytes.
This is your first step.
BUT ... something important you should know. You DO NOT have to get the "pay for" version of MalwareBytes.
It will run FOREVER in "free mode".
You just have to manually run it that way.