Apple has just released a new important software security update to patch the new Shellshock vulnerability for its Mac systems. The update is now available through Apple and is titled the OS X bash Update 1.0 download. There are separate downloads, depending on which version of the OS X operating system your Mac is currently running, whether it's Lion, Mountain Lion, or Mavericks.
Apple had previously said that most of its Mac users are safe from the exploit.
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