Have you accidentally deleted Mac partition? If yes, you should not worry at all. Actually, Mac computers comes with preset divided partition. Sometimes, it may occur that your Mac partition is totally full. If you wish to optimize it and for that purpose you shut down the system then you find that on restarting the Mac computer your partitions are deleted. What may be the reason for accidentally deleted Mac partition? The usual reason for the deletion is power interruption during partitioning. Moreover, If you unintentionally go for file system conversion then, also the problem of data loss appears. Another reason for deletion is improper changes made by third party application. Hence, you should be cautious in case of accidental deletion Mac partition. However, in these situation backup file plays an important role for you. Yes, If you have a backup then you are safe and secured because you can retrieve the data by using the backedup. But, what if there is no backup available or even it get corrupted? Then, in this situation, you should have to make use of third party Mac data recovery software to get back the data after accidentally deleted Mac partition.