By Alex Fitzpatrick
September 2, 2016

Remember that nasty iPhone security flaw we warned you about last week? Apple just released patches fixing similar problems with the software powering Mac desktops and laptops, as well as the company’s Safari web browser.

Left unfixed, the problems could allow hackers to remotely take over your iMac or MacBook. That is, obviously, a Very Bad Thing. So you should update your Mac computer right away.

In many cases, your Apple computer will automatically let you know there’s an update available. This is not the time to ignore that message. Otherwise, you can manually update your machine by opening the App Store on your computer, then clicking “updates” on the top bar. If you’re behind on your updates, you may have to download more than just today’s fix to get fully secured.

Quiz: Can You Guess These Back to School Prices?

These new flaws were uncovered by security firms Citizen Lab and Lookout, the same folks who discovered the earlier iPhone issues.

Write to Alex Fitzpatrick at alex.fitzpatrick@time.com.

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