A virus is a type of malware that can infect a computer and cause damage. Viruses can spread through email attachments, downloads, and even websites. Macs are not immune to viruses, although they are generally less susceptible than Windows PCs.
It is important to check your Mac for viruses regularly to protect your computer and data. There are a number of different ways to check for viruses, including using a dedicated antivirus program or using the built-in virus scanner in macOS.