Apple appears to be taking security more seriously. Just a mere 24 hours after Yontoo adware was discovered to be affecting Mac OS X systems, Apple has pushed out an update to its malware definitions to protect from the malware. The Yontoo adware was found to be injecting ads into sites visited in Chrome, Safari, and Firefox.
Apple hasn't always been so quick to respond to new threats. For a long time, Apple actually advertised that Mac OS X was basically invulnerable to viruses. Variants of Yontoo are bound to show up and it will be interesting to see if Apple is able to keep them at bay. As always, we'll keep our eye on the latest security threats and alert users when major problems arise.