Downgrading a PS4 from firmware 10.50 to 9.00 is ; there is no "magic button" or USB update file that can revert the system. A true downgrade requires complex hardware modification known as reversion , which is only an option if 9.00 was the immediately preceding version installed on that specific console . The Core Reality of PS4 Reversion
Searching "ps4 downgrade 10.50 to 9.00" will lead you to:
| Claim | Reality | |-------|---------| | “Format the HDD to downgrade” | Formatting only removes user data; firmware remains in the Syscon/Flash. | | “Install 9.0 recovery via safe mode” | Safe mode rejects older firmware if efuses are burned. | | “Hardware flasher can downgrade” | Flashers can dump/write NOR, but efuses still block booting older firmware. | | “Downgrade from 10.50 to 9.00 works if you’re on 10.50 now” | False. No verified method exists. |
Since you cannot downgrade to 9.00, you have limited options:
They are almost always fake or scams asking for: