The malware, dubbed Silver Sparrow, has not yet engaged in malicious activity.

Mysterious malware -- that has not yet engaged in malicious activity -- has infected nearly 40,000 Mac devices, according to the cybersecurity firm Red Canary, which first detected the threat.

In this case, we don’t actually know what that ultimate goal is, because we haven’t observed Silver Sparrow engaging in malicious activity.".

Although Silver Sparrow currently does not deliver a malicious payload, Donohue said they are "concerned that it could be updated to deliver one at a moment’s notice."