Hi, My macbook crashed and installed a new hard disk. My mac is form 2011 (OSX Lion). When I want to install the OS again but that is not possible. I took the hard drive out and placed it in an Imac from the same periode. I installed High Sierra and placed it back into the macbook. Booting was no problem until I installed updates. The first time it asked me to reboot. This was no problem. The second time when I installed updates the macbook starts to hang. Now I can't even boot my macbook. I tried all the commands but no result. When I put the hard drive in the imac it boots fine. When I do a clean install on the imac and place it back into the macbook I get the same problem. Apple logo, progressbar til 50% and than a light grey screen before going dark. Even when I try recovery (option + CMD + R) Please, help is very appericiated!