There can be huge amount of trouble when there is Apple Mac volume locked issue faced. You may have locked the Mac volume by your own to prevent unauthorized access of the other users and now it is not getting unlocked because either you have forgotten the password or there is any internal error. Sometimes the Apple Mac volume locked is initiated by any third party program that you have installed and now you are unable to access your own files, uninstalling the program may not resolve the problem. You may try to take help from a professional but he may charge you a lot of money for that. The easiest and the surest solution is that you format and merge the volumes in one and then you can restore the data after Apple Mac volume locked is solved. You can use any of you personal backup source or you can use the Mac data recovery software which will certainly restore all the files that were present in the locked volume which is not formatted. The software is able to recover every type of file that was lost. So you just need to scan the the drive from the software and select desired files from preview to restore. You should download the software now.