The release of the new version of the operating system from Apple was marked not only by widely announced additions to support new M1 processors, built – in T2 security blocks and a program compatibility system for older versions for Intel processors – Rozetta2-but also by new features that are not yet disabled, allowing you to monitor user actions.



According to information from German security researcher Jeffrey Paul, Apple has significantly changed the approach to tracking the actions of its users in the new release of its operating system – Big Sur.


According to the verification of the operation and functioning of the main components of the Big Sur system, the new macOS now sends its own unique hash code to its servers for all applications launched by the user. Since the connection is made over the Internet, a number of standard parameters formulated in the request-response bundle are automatically detected-starting from the computer’s IP address and other standard data-the request time, date, provider, city, computer data, and, of course, the hash of the application being launched.

In other words, from the app data received in response to the request, Apple immediately receives a package of information that allows you to filter and optimize offers for its users: you can immediately see where a person launches the app – from home, on the road, or from work, which apps and for what purpose they use more often – thus automatically ranking and forming groups of users by preferences and similar behavioral reaction profiles…


At the same time, in the new version, it is not yet possible to block application requests – no VPN will help in this case, since the request goes from the system directly to the Apple servers.


Previously, it was possible to block such things on a Mac using a program called Little Snitch. The default configuration allows all communication between your computer and Apple, but you can disable these default rules and continue to approve or reject each of these connections, and your computer will continue to work normally without reporting to Apple.


Mac OS version 11.0, also known as Big Sur, has new APIs that don’t allow Little Snitch to work in the same way. The new APIs do not allow Little Snitch to check or block any OS-level processes. In addition, the new rules in macOS 11 even make it harder for VPNs to work, so Apple apps simply bypass them.

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