iDefrag

iDefrag is a disk optimization utility for macOS that analyzes and rearranges fragmented files on storage devices to improve read performance and system responsiveness. It was marketed to users who wanted to maintain peak disk performance through defragmentation, a common practice on Windows systems but less critical on modern macOS. The app provided visual reports of drive fragmentation levels and offered scheduled optimization runs. iDefrag targeted power users and system administrators concerned with storage efficiency on older Macs.