I asked Copilot to summarise, looks to me like there has been lots of usability improvements. 
- Version 5.6.9, 22 September 2026
Additions and improvements
Native RANE System One integration, including display support.
MIDI actions for changing the Beat Jump duration.
Better playlist presentation on CDJs.
Improved 45 RPM handling with motorized controllers.
Improved cue-point jumping while scratching or during platter slowdown.
Fixes
Fixed Reverse playback changing the pitch on motorized controllers.
Various additional fixes and improvements.
2. Version 5.6.8, 5 August 2026
Additions and improvements
Audio-interface mapping for the Teenage Engineering EP-136 K.O. Sidekick.
Improved Touch Bar Crossfader FX.
Improved DVS pitch-fader accuracy when switching between THRU, REL, ABS and WIR modes.
Fixes
DJM-S11 detail waveforms now show the opening bars correctly.
Fixed XDJ-RX3 waveforms flickering on the hardware display.
Various additional bug fixes.
3. Version 5.6.7, 7 July 2026
Additions
Official Numark Mixtrack GO support.
Official Numark Party Mix III support.
Official AlphaTheta XDJ-AN support.
Fixes
Corrected Automix behaviour with motorized DJ controllers.
Various additional fixes and improvements.
4. Version 5.6.6, 25 June 2026
Additions
Official AlphaTheta CDJ-1500X support.
AlphaTheta DJM-V5 support.
Pioneer DJ DJM-A9 and DJM-V10 support.
Tracks in the queue can now be identified on CDJ displays.
Fixes
Various bug fixes and improvements.
5. Version 5.6.5, 25 May 2026
Additions
Hercules DJControl Inpulse 200 MK3 support.
Artwork can now be read from WAV files.
Fixes
Fixed OneLibrary track-colour changes not being applied.
Fixed CDJ artwork, folder-display and BPM-value problems.
Fixed DDJ-FLX10 Color FX activating while the knob was centred.
Various other fixes.
6. Version 5.6.4, 30 March 2026
Additions
Spotify tracks can be added to personal playlists within My Collection.
Fixes and improvements
Improved VoiceOver support for Neural Mix routing, crossfader assignment and title-bar controls.
Fixed audio configurations not being restored when using multiple audio devices.
Restored the missing Delete option in My Collection.
Fixed Automix not using the selected Queue.
Fixed XDJ-AZ FX BPM updates.
Fixed DJM-S11 library scrolling.
Restored the DDJ-REV1 eight-beat Beat Jump mapping.
Fixed CDJ/DJM MIDI mappings not being restored.
7. Version 5.6.3, 10 March 2026
Additions
Spotify playlist editing directly within djay, including adding, removing and reordering tracks.
AlphaTheta DJM-V5 and Allen & Heath Xone:K3 support.
Reloop Flux and Flux GO DVS-interface support.
Fixes and improvements
Instant Double now copies the Neural Mix state correctly.
Corrected EchoVerb Out post-fader tails.
Fixed cue points not saving with the built-in Scratch Tools.
Improved motorized-controller sync at track start.
Fixed possible DVS audio dropouts when changing FX wet/dry.
Added missing VoiceOver labels.
Improved CDJ audio configuration.
Fixed CDJ scratching becoming stuck after disconnection or jog movement.
Fixed RANE PERFORMER LEDs resetting when hardware FX were selected.
8. Version 5.6.2, 9 February 2026
Additions
Reloop PTB-2 support.
Pioneer DJ XDJ-RX3 screen support.
MIDI actions for moving tracks between decks 1/2 and 3/4.
MIDI actions for stopping a recording and loading it onto a deck.
Instant Double now copies the Sync state.
Fixes and improvements
Fixed OneLibrary Hot Cue colour export.
Fixed missing OneLibrary cue points near the beginning of MP3 files.
Fixed Slip mode during reverse playback.
Fixed dragging tracks from My Collection into other applications.
Corrected CDJ sync-slave BPM information, jog-mode lighting and Pro DJ Link connection issues.
Improved DDJ-FLX10 stem splitting and doubling.
Added DJM-S11 deck-move mappings.
9. Version 5.6.1, 17 December 2025
Additions
Native Pioneer DJ DJM-V10 support.
Pro DJ Link connections through DJM-V10 and DJM-A9 mixers.
RANE ONE MKII parameter buttons can switch Cue Point pages.
Inpulse browse knobs can flash in time with the beat.
Fixes and improvements
Fixed DJM-S11 software FX muting the audio.
Fixed DDJ-1000 Beat FX display.
Corrected RANE ONE MKII Censor mapping.
Fixed RANE PERFORMER audio setup and improved waveform zoom.
Improved RANE SEVENTY-TWO waveform zoom.
10. Version 5.6, 11 December 2025
Major additions
Spotify integration across supported devices.
AlphaTheta XDJ-AZ and Pioneer DJ Opus Quad support, including their displays.
Display support for DJM-S11, DDJ-REV7, DDJ-1000 and Omnis Duo.
Allen & Heath Xone:24C support.
Adjacent musical keys can be colour-matched or highlighted.
Adjustable line-fader curve.
“Keep Playing After End of File” MIDI setting.
Fixes and enhancements
DVS no longer starts playback unexpectedly when switching to INT.
Added second Cue Point pages to several Pioneer controllers.
Added DDJ-1000 Beat FX and Color FX support.
Corrected DDJ-800 Pitch Play.
Added DJM-450 DVS support.
Fixed Gated Cue and USB-switching behaviour on Pioneer mixers.
Improved DJM-S11 pad-mode and browse-knob behaviour.
Improved fast scratching on CDJs.
11. Version 5.5.2, 24 November 2025
Additions and improvements
Tempo Blend Crossfader FX in External Mixer mode.
Improved alert display when panels are open.
Improved OneLibrary access to USB drives on macOS 26.1.
Added RANE ONE MK2 Pickup-mode LEDs.
Fixes
Fixed missing OneLibrary cues and loops when tracks were first encountered.
Fixed the search-field Clear button on macOS 26.1.
Fixed track previews when the Track Info panel was open.
Fixed RANE ONE MK2 pitch resetting when switching USB source.
12. Version 5.5.1, 4 November 2025
Improvements
Updated interface for macOS Tahoe.
Added CDJ-3000X Pro DJ Link support.
Fixes
Fixed OneLibrary naming conflicts involving long track names.
Fixed beat grids ending prematurely.
Fixed deletion of analysis data and images when deleting tracks.
Fixed USB devices that could not be ejected.
Reduced DDJ-REV7 Instant Start lag.
Fixed the inaccessible final library row on the XDJ-1000MK2.
13. Version 5.5, 21 October 2025
Major additions
Introduced OneLibrary, allowing playlists, cue points, loops and beat grids to be transferred using USB drives.
Added USB Library browsing and editing within djay.
Added CDJ-3000X, XDJ-1000MK2 and DDJ-XP1 support.
Added RANE SEVENTY-TWO display integration.
Added motor-off support for RANE ONE, ONE MKII and PERFORMER.
Added detailed PERFORMER beat-grid waveforms.
Added DDJ-FLX10 PAD INFO.
Added two-column media-library sorting.
Added 4% and 6% pitch ranges.
Added new DVS, MIDI, Slip-mode and motorized-controller options.
Fixes and improvements
Refreshed the interface for macOS Tahoe.
Improved beat-grid editing.
Improved Gate FX, Beat Sync, BPM linking, pitch bending and Instant Start.
Improved Automix error handling.
14. Version 5.4.4, 2 October 2025
Fixes
Fixed Automix not operating correctly when the screen was off in macOS Tahoe.
Improved RANE ONE MK2 connection stability.
Various additional bug fixes.
15. Version 5.4.3, 24 September 2025
Major additions
Spotify integration, including personal playlists, editorial playlists, catalogue access and search.
Option to show Neural Mix controls on standard waveforms.
Streaming-service logout option.
MIDI actions for selecting a particular view.
Undo and Redo for Cue Point renaming.
Fixes
Fixed AirPods compatibility when the microphone was enabled.
Restored the External Mixer pre-cue auto-select setting.
Fixed DDJ-GRV6 Stems FX being reset when loading tracks.
Fixed DDJ-REV5 parameter buttons affecting every FX unit.
Corrected RANE ONE MKII Stems mappings.
16. Version 5.4.2, 18 August 2025
Additions and improvements
Added 3 dB and 6 dB output-headroom options.
Added MIDI actions for moving beat grids left or right.
Added default-sort-order support for Beatport and Beatsource.
Expanded External Apps metadata, colour, cue, loop and external-drive support.
Added 64-beat and 128-beat Auto Loop MIDI output.
Fixes
Fixed External Apps cue offsets and metadata retrieval.
Fixed missing subsonic and supersonic frequencies after EQ/filter reset.
Fixed Cue Point layout problems.
Fixed controller-specific FX, paddle, BPM and Beat Jump mappings.
17. Version 5.4, 31 July 2025
Major additions
Full Pioneer DJ DDJ-FLX10 integration with jog-wheel displays.
External Apps library source.
Up to 16 Hot Cues per track.
Loops can be saved as Hot Cues.
Up to 16 Cue Point colours.
Automatic activation of the first saved loop or Cue Loop.
Allen & Heath Xone:23C support.
External-input recording with several supported controllers.
Fixes and improvements
Improved loop creation, Neural Mix transitions and Key Lock latency.
Improved Beatport and Beatsource preview loading.
Improved deck selection when double-click loading tracks.
Fixed Key Lock audio artefacts.
Fixed Looper routing and External Mixer pre-cue volume.
Fixed Neural Mix EQ reset.
Fixed occasional hangs when loading uncommon file formats.
Fixed DDJ-GRV6 meters and DDJ-FLX4 Shift+Cue behaviour.
18. Version 5.3.3, 30 June 2025
Additions
MIDI actions for 64-beat and 128-beat Auto Loops.
Copy and Show Info track-menu options.
Fixes and improvements
Reverted Sync behaviour so changing an inaudible deck’s tempo does not change other synced decks.
Improved Crossfader FX transition timing.
Fixed Crossfader FX ignoring the configured Beat Sync interval.
Fixed Gain knob range inconsistencies.
Fixed Sync selecting an incorrect half or double tempo.
Fixed Automix crossfader assignments.
Fixed iCloud Drive tracks becoming unavailable after restarting.
Fixed Crates drag-and-drop.
Fixed metadata edits containing non-English characters.
Fixed DDJ-GRV6 pitch-fader Pickup mode.
19. Version 5.3.2, 21 May 2025
Additions
Option to unlink the controller Gain control from the on-screen Gain knob.
Hold-to-snap function for saved loops.
Tempo changes on any synced deck can update the other synced decks.
Active Deck Protection extended to Automix.
Fixes and improvements
Improved Automix and Crossfader FX transitions.
Improved Tab-key library navigation.
Fixed lingering Echo after Automix transitions.
Fixed Quantized Hot Cues not exiting loops correctly.
Fixed Looper synchronization.
Fixed Phase REL pitch estimation.
Fixed rating metadata.
Fixed Automix loading the wrong track.
Fixed MIDI library focus and several playlist-interface problems.
Improved DDJ-REV5 and DDJ-GRV6 jog sensitivity.
Fixed DDJ-FLX10 Beat FX on decks 3 and 4.
Fixed DJM-S11 settings and RANE TWELVE deck LEDs.
20. Version 5.3.1, 18 April 2025
Additions and improvements
Hold-to-snap behaviour for the Cue button.
Locate Track action in the main menu and MIDI mappings.
Improved Sync with polyrhythmic loops.
Improved Neural Mix Crossfader FX on slower devices.
Fixes
Fixed Crossfader FX audio bleed.
Fixed unwanted Echo Out when using Mute FX or Neural Mix routing.
Fixed Neural Mix FX tails losing Beat Sync.
Fixed sorted playlists losing their scroll position.
Fixed DDJ-GRV6 four-beat loop behaviour and Pitch Cue ordering.
Fixed Numark NS4FX deck 3 Play changing the crossfader assignment.
Note: These are specifically the official djay Pro for Mac changes. The Windows, iPhone/iPad and Android releases sometimes have different version numbers and platform-specific additions or fixes.