Image copyright PA Image caption Apple has released an update to address Spectre and Meltdown
Apple has issued a critical software update in response to the Spectre and Meltdown security flaws.
Some devices that are vulnerable have already been updated.
The company urged all users and developers to take advantage of the patch.
Intel , Apple and Google have released software that fixes the flaws.
Image copyright Getty Images Image caption Security experts have warned companies that this flaw could be used in cyberattacks
Apple, which does not make processors, says the flaw could allow hackers to access a security component that is typically unpatched.
However, computer users can protect themselves by not installing any antivirus software that has been released to mitigate the problems or by using a “downgrade to safe mode” option on most Windows machines, according to David Marcus, director of cybersecurity strategy at the security company McAfee.
Meltdown and Spectre have yet to be patched by major computer makers .
Other companies have already released fixes including IBM , Hewlett Packard, Microsoft and Amazon.
Last week, there were reports that US spy agency spies had engaged in insider attacks, which could have allowed them to exploit the flaws.