Mac malware is hiding in iCloud Calendar to sneak onto computers
A harmful program affecting Mac computers is using public iCloud calendar entries to secretly deliver more malicious files. This means attackers are hiding their activity inside a common Apple service, making the threat harder to notice.
Who is at risk
People and organizations that use Mac computers, especially those signed in to iCloud and using Calendar, are most at risk.
What to watch for
Watch for unexpected calendar events, strange pop-ups, unknown apps or files appearing, or a Mac suddenly acting slow or unusually busy.
What to do
Check your iCloud Calendar for events you do not recognize, remove anything suspicious, update your Mac and security software, and run a full device scan right away.