By John Gruber
Kolide by 1Password ensures that if a device isn’t secure, it can’t access your apps.
Apple:
The OSX.MacDefender.A definition has been added to the malware check within File Quarantine. […]
The system will check daily for updates to the File Quarantine malware definition list. An opt-out capability is provided via the “Automatically update safe downloads list” checkbox in Security Preferences.
★ Tuesday, 31 May 2011