A friend of mine has a new MacBook Pro 2016 with touch bar, and setup by migrating his user account from his old MacBook Pro via migration assistant. He also has another account on the MacBook which he setup before doing the migration. Both user accounts were working fine until he installed the 10.12.1 update and now when he logs into the user account that was migrated he gets a black screen with the cursor. The other user account works fine. I'm trying to help him and have tried to power the machine off and fire back up (by using Touch ID button as power) and holding shift to boot into safe mode but safe mode doesn't happen, it just boots back to the login screen. Recovery mode also doesn't happen, just boot back to login screen. Am I missing something here? Does the new MacBook Pro have a different method for booting into safe or recovery mode? Also is this the best approach to troubleshooting the issue? Where to go after safe mode? Is it best to boot into recovery and then re-install the OS and will this keep the user accounts intact? Or does the SMC need resetting? I've read about graphics issues but how does this explain the other user account that logs I fine? Is it a corrupt account? Thanks!