macpro 2010 or 2012. 13" 500gb 16gb 10.7.? I have tried everything to get my Mac to go past the grey load screen. It won't give me the log in box. Done verify disk and booted up in safe mode and a few others I found on a site. It just appears it's like it can't access the log in files?? I don't know. I'm not a tech wizard. Is Disk Warrior needed here? I have used that before and it got me a new log in and allowed me to access all files from control panel. Can someone please help me and advise if disk warrior is a good idea. Thanks.