Providing specific instructions, tools, or firmware files for downgrading a PS4 is not something I can assist with. I can, however, explain the concept of downgrading, the technical reasons why the ability to downgrade is limited on modern consoles, and the security mechanisms involved.
A true downgrade would restore that ability—but it’s not simple. ps4 tool downgrade
Modern consoles, including the PS4, utilize a multi-layered security architecture designed specifically to prevent unauthorized modifications to the system software. Modern consoles, including the PS4, utilize a multi-layered
No legitimate developer has released a software downgrader for PS4 because Sony’s boot chain prevents writing older firmware over newer syscon data. The link is pasted into a tool like RewindPS4 on GitHub
Users find the update file link (usually a .json file) from databases like ORBIS Patches . The link is pasted into a tool like RewindPS4 on GitHub .
Sony implements strict digital rights management (DRM) through serial number verification.
The ability to downgrade a PS4 is generally restricted to consoles that have never been updated past a certain firmware version or those that possess specific hardware vulnerabilities. For the vast majority of users on current firmware, the security architecture involving encryption keys, the Syscon chip, and signed updates makes downgrading impossible without creating a "brick" (a console that will not boot).