Therefore, it is categorized as a Potentially Unwanted Application (PUA).Īs mentioned above, Mac File Opener typically infiltrates systems without permission. By offering this feature, Mac File Opener attempts to give the impression of legitimacy, however, this app is likely to infiltrate systems without users’ permission. Mac File Opener is another deceptive application that claims to allow users to open various file types that cannot be opened using Mac applications installed by default.