Answer 1
I think there is some problem in OS. Might be it is corruption or something else. There may be chance of data lost. Data.. which is very important for you. First take a backup of your Mac system and then reinstall OS. When you reinstall OS once again then take back all data from backup. If you will not make backup then you can lose your valuable important data. This time you may not be able to make backup of most of data but don’t worry, first reinstall then use Mac data recovery software to recover all those data which you will lose. Easily, without having any problem you can use this software to recover your lost data. But right now you will overcome from the problem which you are facing.