Even though the patch was made available with an update to latest OS, still OS X which runs on MAC PC is at risk. Just in case you didn’t knew about it that, Apple devices had occurred a major security flaw in both iOS and OS X based devices which can get unauthorized access to your devices and its registered accounts in different websites.
Researchers from CrowdStrike described the bug in a report:
“To pull off the attack an adversary has to be able to Man-in-The-Middle (MitM) network connections, which can be done if they are present on the same wired or wireless network as the victim. Due to a flaw in authentication logic on iOS and OS X platforms, an attacker can bypass SSL/TLS verification routines upon the initial connection handshake. This enables an adversary to masquerade as coming from a trusted remote endpoint, such as your favorite webmail provider and perform full interception of encrypted traffic between you and the destination server, as well as give them a capability to modify the data in flight (such as deliver exploits to take control of your system),”
Its required that Apple should take immediate steps in order to provide seamless services in terms of information security