Are you familiar with the term "zero-day?" It's a computer bug that hasn't been patched yet. It's called zero-day because once it's discovered, coders have zero days to fix it. A new one has been found in all versions of Mac OS X Yosemite that could let hackers into your Apple computer.
Apple just released an upgrade for Yosemite last week, but a teen in Italy discovered a flaw, known as "tpwn," that can allow hackers access to your system. The bug isn't present in the upcoming OS X El Capitan, according to V3, but affects all versions of Yosemite.
Apple has been made aware of the "tpwn" vulnerability, but hasn't issued a patch for it yet. There is a third-party patch called NullGuard on GitHub, but it's not certified by Apple. If you're a Mac user, open the App Store and check for updates often.
Apple's Macs have a long-held reputation for being secure from viruses and bugs, but that's disappearing as more vulnerabilities are discovered. Earlier this month, we told you about Thunderstrike 2, the first Mac firmware worm that spreads from Mac to Mac.
For all the security alerts for Macs and PCs, check back often to our Happening Now page.