If you need to undelete files on Mac, the first thing you’ll want to do is download the free Disk Drill Basic. With Disk Drill Basic you can scan the disk for lost files and preview the files recovered. If there are any files hiding on your disk, Disk Drill will find them!
The best way to undelete data on Mac is to protect it beforehand. Free Disk Drill offers multiple options of protecting your important files: Guaranteed Recovery, Recovery Vault, and S.M.A.R.T. monitoring. With these protection features you save yourself lots of effort and time and don't even worry about ever losing your files.
Disk Drill's Deep Scan works through the raw data on your hard disk. When it needs to look into the core structure of the files it won't matter if your drive is FAT, or NTFS, or other. Disk Drill uses its wide knowledge of file signatures in order to put the remaining fragments together and undelete data on Mac the best way possible. Once the binary signature was recognized the app easily undeletes lost files like .jpg, .doc, .xls, etc.