All Macs don't have malware, but if someone enters their Mac's admin password to download so-called antivirus software (that supposedly scanned their entire hard drive in a matter of seconds) to rid their Mac of a number of reported viruses on their Mac, he/she will install bogus software - a hoax - not any legitimate antivirus software along with being prompted to provide a credit card to purchase the so called antivirus software before it rids their Mac of a number of viruses that don't exist.
The so called malware is nothing but a phishing scam to get a person's credit card number for absolutely nothing. Apple can do nothing about what lies between a person's ears.