Accept Sony's terms and agreements and let the update finish. Your PSP will reboot into a completely un-hacked, clean .
Safely disconnect the USB, navigate to , and boot the 5.00 M33 installer.
Before proceeding, backup your PSP's memory stick and any important data to prevent loss during the upgrade process. psp 352 m33 upgrade to 660
: Stabilizes PlayStation 1 (PSOne Classic) emulation with updated audio and video keys. Critical Preparation Checklist
Place the 500.PBP file inside the UPDATE folder provided by the 5.00 M33 installer download. Accept Sony's terms and agreements and let the update finish
Note: Your PSP is now on official firmware and cannot run homebrew or ISOs yet.
In the annals of handheld gaming history, few devices sparked a "cat and mouse" game quite like the Sony PlayStation Portable (PSP). At the heart of this legend lies the transition from the golden age of "M33" custom firmware to the modern stability of the 6.60 era. Upgrading a PSP from version to 6.60 is more than a simple software patch; it is a journey through the evolution of digital sovereignty. The Legend of M33 and Dark_Alex Before proceeding, backup your PSP's memory stick and
⚠️ On CFW 3.52 M33, you must first disable any “Hide MAC” or kernel plugins, or use Hellcat’s Recovery Flasher to go to 5.00 M33-6 first. But normally you can run the Sony updater directly from XMB.
Disconnect the USB, navigate to , and launch the PRO Update app.
(Optional) If you have a PSP 1000 or early 2000, run the to make the firmware permanent. For newer models, use FastRecovery if the console restarts.
Your PSP must be charged to at least 78% . For safety, keep the official AC adapter plugged in throughout the entire update process.