first of all, I apologize for my bad english I have a question and I will be really happy if someone can help me. A while ago I bought an imac from 2015 as used ( so I don`t have any invoice) but lately I miss some speed and because of this I decided to upgrade HDD to SSD. When I did it and wanted to do a clean install, I got a padlock on the screen, "So frimware password", and I don't have this one. I tried to go to recovery mode via Command + R, but when I pressed that, it asks again for the password. boot via USB failed. NVRM reset failed memory replacement, not helped
Does anyone have any idea about this ??
