These files are often used to distribute trojans or ransomware disguised as legitimate software.
To safely download and install McAfee products, you should use the official McAfee Protection Portal . Download pack mcafee rar
If you are trying to a specific .rar file that McAfee is currently blocking, you can add an exception by going to My Protection > Real-Time Scanning > Excluded Files and adding the file there. These files are often used to distribute trojans
Legitimate McAfee installers are typically provided as .exe (Windows) or .dmg (Mac) files directly from their website. If you have downloaded a "McAfee pack" in a .rar format from a third-party site, be cautious: Download pack mcafee rar