You cannot natively run a PS3 PKG file on a PS4. The two consoles use completely different internal hardware architectures:
The PS4’s CPU is relatively weak for heavy emulation. Most demanding PS3 exclusives are unplayable or run at single-digit frame rates. ps3 to ps4 pkg install
If you saw a tutorial or tool claiming “install PS3 PKG on PS4,” it is , a scam , or mislabeled (it might actually mean converting a PS3 game to run as a PS2 Classic style — which doesn’t work for PS3 games). You cannot natively run a PS3 PKG file on a PS4
When people ask about "PS3 to PS4 PKG install," they are typically looking for a process similar to PS2 Classics PS1 injects ” it is