I created a guide back in January to hack the PSP, because most guides were outdated and did not work. I improved the guide and removed and added some things. Here it
How To Hack Your PSP With MAC OS | CFW 6.60 PRO-C Permanent | 2017 Tutorial - YouTube
3 Ways to Hack a PlayStation Portable - wikiHow
3 Ways to Hack a PlayStation Portable - wikiHow
How to install custom firmware on PSP - Easy 2021 (version 6.60) - YouTube