Thanks MacTester, you're very helpful, but the issue remain the same. I made other test and finally I've reinstalled everything from beginning.
Now the system boot normally from internal SSD! I don't know where is the culprit, the important thing is that works!
The new issue is the ethernet. Do you remember I said that I've to change the kext file because the ones you have give me don't work? Now with the new kext (extrapolated from multibeast) don't work either.
Where can I check for find the problem?
Another question: Why when I boot from USB Installer in the Clover information I read "EFI Revision: 2.40", while when I boot from internal disk Clover give me "EFI Revision: 2.31"?
This thing change the screen resolution of clover display too.
Thanks again!
EDIT:
No, the system was too unstable, so I decided to start all over again.
I recreated the usb installer changing USB Stick (which, in hindsight, seems to be the culprit). In fact now the installation is done in two stages as had happened to me the first times with Clover, while the last few times, with the other USB stick, the installation did not require a reboot ...
Now everything is more stable: the ethernet works, boot from the internal SSD is fine.
The only thing wrong is the audio! I used your DSDT file, but the script of toleda always returns the same error: "No audio codec" (among other things with your files config.plist and realtekALC.kext, should already make the working sound, is not it? )
Doing some debug with IOregistry, I always have the value "00 00 00 00" on id-layout and in DPCIManager, the Codec ID field is null. I tried every inject id in Audio section of config.plist.
What's wrong this time? Is there any particular setup in the BIOS?
Another question, for my setup (i3-3225) would not be suitable the setting "iMac13,1" instead of "MacMini6,2" seen that the configuration Education was equipped with the same CPU?
Thanks to all those who will help me.
