The latest AV-TEST reports highlight the threat of MacOS malware and PUPs over the last several years: Today, the biggest threats to Mac users is adware - the largest category of malware aimed at Mac computers - and potentially unwanted programs (PUPs), also known as potentially unwanted applications (PUAs). In fact, the very first virus - or malware (malicious software) - was designed to infect Apple computers. Despite popular misconceptions that Macs don’t get viruses, the opposite is true. To protect your system you need to check for and remove adware from your Mac regularly.īecause adware removal is no longer an option.