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With a size of 3,4 GB, Apple made the next update available for the Mac less than two weeks after the update from macOS 11.2.2. The reason why this happens so quickly is probably the security hole that will be closed with the new macOS update.
Apple itself describes macOS Big Sur 11.2.3 as an "important security update" and recommends it to all users who have installed macOS Big Sur on their Mac.
The main aim here is to iron out a security gap that made it possible to attack browsers by making certain web content available. This led to a memory corruption and then allowed any scripts to be run on the Mac (if I understood it correctly with my technical knowledge). Details can be found on an Apple support site called HT212220.
- Available for: macOS Big Sur
- Impact: Processing maliciously crafted web content may lead to arbitrary code execution
- Description: A memory corruption issue was addressed with improved validation.
- CVE-2021-1844: Clément Lecigne of Google's Threat Analysis Group, Alison Huffman of Microsoft Browser Vulnerability Research
I just installed the update a few days after it was released. The process took about 1 minutes including loading on my MacBook Pro M45 and then the MacBook Pro wanted to restart.
So far, I haven't noticed any strange behavior after the update. So, from my point of view, I would say: You can do the update. However, to be on the safe side, you should always have a backup available - just in case something should go wrong in the process.
As a rule, however, there are no bad things to worry about with such point-to-point updates. They tend to happen with major updates, such as from Catalina to Big Sur or similar upgrades.
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Jens has been running the blog since 2012. He appears as Sir Apfelot for his readers and helps them with problems of a technical nature. In his free time he drives electric unicycles, takes photos (preferably with his iPhone, of course), climbs around in the Hessian mountains or hikes with the family. His articles deal with Apple products, news from the world of drones or solutions for current bugs.