Yesterday afternoon Spanish time, Apple released the pre-final version of macOS Big Sur, a version of macOS that will likely be released when end the presentation event of the new Mac range scheduled for November 10. With the release of macOS Big Sur, older computers (before 2014) are left without the ability to upgrade their computers.
Fortunately for all those users, Apple does not forget the latest version available today for Mac, macOS Catalina, and has released a complementary update, with which Catalina will probably be officially fired unless a new serious security flaw is detected that forces her to release a patch, as is precisely this case.
As we can read on Apple's support page, the supplemental update 10.15.7 patches three discovered security flaws go Google Project Zero team, so from Apple they recommend installing it as soon as possible. Among these three flaws are a vulnerability that could allow maliciously crafted fonts to execute arbitrary code, as well as two kernel flaws that could allow malicious applications to execute code with kernel privileges and reveal kernel memory.
This new patch is released one month after the 10.15.7 update was released, an update that corrected a large number of errors, one of them affected the operation of WMware, an application that had stopped working with the launch of the previous update and that this developer claimed was due to a problem with the latest version that Apple had launched from macOS Catalina.
To download this new supplementary update, which according to the team occupies around 1 GB, we must access System Preferences and click on Software Update.