Hello Daigosx. All done. Everything works fine. Thank you very much.
Do you recommend a usb to connect with wifi? With Sierra I used edimax but I see that the drivers are not found for the big sure.
Thanks so much :). Everything works fine, but I have Catalina installed, I didn't have Big Sure installer.
Just two other things.
1) If I leave the pendrive inserted, osx starts otherwise it does not
2) The serial number is all 00000000
is there any way to change it? Thank you