Hardware conflicts may cause system crash resulting in loss of Mac partitions.Change file system of Mac hard drive partition from FAT to HFS or vice-versa without backup of the files.Shrink or extend size of hard drive partitions on Mac.Human errors lead to data loss from HDD partitions.Some third party applications creates or deletes existing partitions on Mac.In this article, we will talk about how this happens and how to deal with partition data recovery on Mac. While this may lead to the complete data erasure. We store various forms of data including documents, spreadsheets, pictures, images and videos on our Macs, sometimes we erase something very important and our Macs get corrupted, what should we do? If you no longer see your familiar volumes in Finder, and newly existing ones appear to be empty or cleared, you might have lost your partitions.

What should I do to recover partition data? - From CapitanDave I tried doing recovering and re-install but I got errors all round. Now I can only use my Mac with the USB in. I had to download and run El Capitan from USB and when I tried to make the USB bootable with a third-party software, I got a zero.error. I have erased something very important and now the system is in a state. I was trying to partition my MacBook Pro (with Retina with El Capitan) and I have totally messed up my laptop.

Mac create recovery partition