The Mac drive is showing full and you can not write any new file in the drive then you have to fix Mac hard drive full error so you can perform further process uninterruptedly. The Mac drive showing error is a clear indication that the mac drive is corrupted. The corruption can be in the Mac file system whose header file is damaged because of abrupt shut down, power surge. If the drive is infected by virus then the corruption can occur and then you make the use of disk utility which can scan the drive for the cause of damage and then try to fix Mac hard drive full error . If the problem is not fixed then you have to format the drive but now you must be worried about the data which is deleted then it can be recovered with the time machine backup utility. The last option would be the Mac data recovery software which is easy and effective way to get your Mac files back. The software can be operated easily with by any novice user so download the software and recover your data after you fix fix Mac hard drive full error.