Summary: The journey of file systems in Apple products from type and creator codes to APFS is recounted. APFS brings features like snapshots and copy-on-write clones, enabling efficient backups and instant duplicates. The author developed an app, Hyperspace, to reclaim disk space by converting identical files into clones without deleting them. Hyperspace is available for free download and scanning but requires payment to recover space. The app, built using SwiftUI and Swift 6, is described as risky but potentially useful. The author hopes it will be a valuable addition to the Mac ecosystem.
https://hypercritical.co/2025/02/25/hyperspace