Downgrading a Go to product viewer dialog for this item. from firmware 10.50 to 9.00 is not possible through simple software settings or USB updates. Sony prevents downgrades to block security exploits found in older versions like 9.00.
The pursuit of the "Golden Firmware"
If you are active in the PlayStation 4 homebrew or jailbreak community, you have heard the legend of Firmware 9.00. Released in late 2021, this version is considered the "holy grail" for modders. It was the last firmware that security researchers successfully exploited using a WebKit vulnerability combined with a crafted USB exFAT drive. ps4 downgrade 10.50 to 9.00
For more information on PS4 downgrading, jailbreaking, and homebrew, check out the following resources:
A PC with specialized Python scripts for Nor/Syscon patching. 3. The Process Dump the Nor flash memory and the Syscon chip. Downgrading a Go to product viewer dialog for this item
Reverting a PlayStation 4 from firmware 10.50 to 9.00 is not possible through standard software menus or USB updates alone. However, it can be achieved through a highly technical hardware process known as firmware reverting. The Core Concept: Slot Switching
Theory vs. Reality:
Key risks