Hi guys, I hope so that anyone out there is able to help me. I followed all steps and the fix worked with an old El Capitan OS X. Today I upgraded my OS X to Sierra to backup my old data from an external drive. Since I upgraded to Sierra the fix isn't working anymore. So I did the fix again and it worked very well. My Mac reboots until the login screen. After entering my password OS X is loading and loading and after a while it restarts again. Sierra isn't starting anymore. I did the fix again several time but in the end it's always the same result: loading after entering the password and after around 10 seconds my Mac restarts. Any ideas to fix this problem? Thanks in advance for your help!