You can try to see if PSProxy and SKFU Pr0xy works for you. It still works for me.
PSProxy is to download anything, except update, SKFU Pr0xy is to install what you've downloaded.
Wait what? I'm still trying to get PSProxy to work, but I haven't had any success. I even updated ps4-updatelist.xml and still nothing. I see links being redirected, but nothing works.You can try to see if PSProxy and SKFU Pr0xy works for you. It still works for me.
PSProxy is to download anything, except update, SKFU Pr0xy is to install what you've downloaded.
There's an option in the settings where you can turn off automatic downloads for updates. Turning that off will not make the console download the update no matter what firmware you're on. But if you try to connect to wifi and sign in, it'll already detect that it needs to be updated to the latest firmware. Which is why some people need a proxy to avoid that wall and stay on a lower firmware.So in conclusion, it's not possible?
I read somewhere that the PS4 will only download the system update but not install it automatically unless this feature is enabled in sleep mode
Is that not true? If so you could just continually refuse to install the update (perhaps not ideal)