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PhotoRec can recover data from various filesystems including FAT, NTFS and HFS+. PhotoRec ignores the filesystem and goes after the underlying data, so it will still work even if your media's filesystem has been severely damaged or re-formatted. PhotoRec is file data recovery software designed to recover lost files including video, documents and archives from Hard Disks and CDRom and lost pictures (thus, its 'Photo Recovery' name) from digital camera memory. It will also find accidentally deleted partitions (either Apple Partitions, the newer EFI partitions and Windows MBR Partitons) and provide the necessary information for you to restore them using the Apple pdisk command (for Apple Partitions) or the gpt command for (for EFI partitions) The TestDisk program is powerful free data recovery software! It was primarily designed to help recover lost partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally deleting a Partition Table). This free benchmark app measures Macs disk speed, and other capabilities. As a result, these programs are designed for support personnel and experienced Mac users. On your Mac, open Disk Utility in the Utilities folder in Applications. It is free to download from Mac App Store.

They are used on the command line in the Terminal. Disk Utility will check the hard drive on your Mac for errors. Find your disk in the list on the left side (if you have multiple disks), and click on it. TestDisk download contains TWO programs - TestDisk and PhotoRec. To check your Mac’s disk with Disk Utility, follow these steps: Start Disk Utility from Applications -> Utilities.