Tech giant Apple has confirmed that all iPhones, iPads and Mac computers are affected by two major flaws in their computer chips.
Mac products are often considered to be less vulnerable to security issues than tech products from other brands.
However, with billions of PCs, smartphones and tablets around the world are affected - Apple has now confirmed its products are too, and has released some patches to mitigate the Meltdown flaw.
Tech companies have been racing to fix the Meltdown and Spectre bugs that could allow hackers to steal data.
The Meltdown and Spectre flaws are found in many of the microchips made by Intel and ARM. The two companies supply almost the entire global computer market.
Google and Microsoft have already issued statements telling users which products are affected by the bugs.
Google said its Android phones were protected if users had the latest security updates, while Microsoft has already released fixes for many of its services.
Windows users have been warned that third-party anti-virus software may need to be updated before applying operating system patches.