Why is

Why is my Rekordbox library missing tracks?

The red icon almost always means the file path changed. The track is still on disk — Rekordbox just lost the breadcrumb. Bulk repair takes minutes.

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The problem

You open Rekordbox and tracks that worked yesterday are showing the red "missing file" icon. The audio file is almost certainly still on disk — what changed is the path Rekordbox stored when you imported the track. Common triggers: macOS reorganized your home folder during an OS update, you renamed a music folder, you moved your library to a bigger drive, your external SSD remounted with a different mount point, or Time Machine restored files into a slightly different path.

How Music Library Doctor does it

1 Confirm the files are still on disk. Open Finder/Explorer, navigate to where the tracks should be — if they exist, this is a path-change issue, not data loss.
2 Install Music Library Doctor. MLD opens Rekordbox master.db (encrypted 6+ supported) and reads every path reference.
3 Add your music folders (current locations, including external drives). MLD scans them and matches missing tracks by filename, file size, and audio fingerprint.
4 Review the proposed re-links. The built-in player lets you preview a candidate before committing.
5 Accept the matches. MLD writes corrected paths back to master.db. Reopen Rekordbox — the red icons are gone.

Supported today

Rekordbox · Serato DJ · VirtualDJ (incl. Favorite Folders) on Windows 10+ and macOS (Apple Silicon + Intel).

Why native integration matters

Rekordbox stores absolute paths, which means any reshuffle of folders or drive mount points breaks the link. Rekordbox's own Relocate Missing Files tool works one file at a time and doesn't use audio fingerprinting, so it fails when two files share a name. MLD parallelizes the search across multiple folders and drives, uses Chromaprint fingerprinting to disambiguate, and writes back to encrypted master.db — fixing 500 missing tracks in the time Rekordbox would take for 5.

Frequently asked questions

Why did this happen after a macOS update?

macOS occasionally reorganizes home folder contents (especially during major version upgrades) or remounts external drives at different paths. Both invalidate the absolute paths Rekordbox stored. Files are usually fine — the references just need updating.

What if my external drive is unplugged?

Tracks on an unplugged drive aren't actually missing — they're offline. MLD distinguishes the two and keeps offline tracks in the library rather than flagging them for cleanup. Plug the drive back in and the offline indicator clears.

Will this damage my Rekordbox library?

MLD takes a timestamped backup of master.db before any write. The encryption key is preserved. If something looks off after the repair, restore the backup with one click.

What if I deleted the files for real?

Then they're not coming back via this route. MLD flags those separately as "file genuinely missing from disk" so you can clear them from Rekordbox if you want.

Does it work on Rekordbox 7?

Yes. MLD handles Rekordbox 6.x and 7.x encrypted master.db formats.