6000.6.8f1

Supported · Released Nov 3, 2026 · Changeset 237b6593792b · 11 release notes

Unity 6.6 feature guideUnity release pageRelease notes (markdown) Open in Unity Hub
65build score
Upgrade risk+26Net cleanup+22Live debt+17
cohort: Update/Supported (69)
How this number is computed

Composite = sum of sub_score × weight across six metrics. Sub-scores are percentile-rank(log1p(min(raw, p95))) within the Update/Supported cohort (69 releases). Sub-scores for lower-is-better metrics are flipped to 100 − percentile.

Sub-scoreFormulaRawClip%ileWeightScoreContrib
Breaking surface(breaking_change + api_change) / total_notes8.8e-38.8e-36225%389.6
Blocker rateblockers / total_notes0.0350.0351815%8212.3
Mobile riskmobile_known_issues / total_notes0.0180.0185610%444.4
Fix densityfixes / total_notes0.798*0.7959715%9714.6
Net-fix delta((fixes − known_issues) − prior.(fixes − known_issues)) / total_notes0.0530.0534915%497.3
Known-issue debtknown_issues / total_notes0.0960.0961520%8517.0
Composite65

* = raw value was clipped at the cohort 95th percentile to prevent outliers from compressing everyone else's scores. Sub-scores marked "med" substitute the cohort median where the input was missing (e.g. first patch on a minor line has no prior patch for net-fix delta).

Back gesture/button closes the app after returning from background when "Run In Background" and "Predictive Back Support" are enabled
Linked bug report
UUM-159613: Back gesture/button closes the app after returning from background when "Run In Background" and "Predictive Back Support" are enabled

How to reproduce: 1. Create and open a new project 2. Navigate to Project Settings, Player tab (Edit > Project Settings > Player) 3. Toggle on Predictive Back Support (Other Settings) 4. Toggle on Run Without Focus (Resolution and Presentation) 5. Build and Run for Android 6. On the device tap or gesture the back action 7. Notice the app doesn’t go to background or close 8. Put the app in fore…

Retrieved 2026-11-10
AndroidKnown issueCautionUUM-159613
[macOS] Player libraries are code signed with bespoke entitlements
Linked bug report
UUM-156884: Player libraries are code signed with bespoke entitlements

Steps to reproduce: Build any project as a macOS Standalone player (IL2CPP or CoreCLR scripting backend) In Terminal, run: codesign -d --entitlements - --xml "<Build>.app/Contents/Frameworks/UnityPlayer.dylib" Run: codesign -dv "<Build>.app/Contents/Frameworks/UnityPlayer.dylib" (and on other dylib files) Actual results: The libraries carry Unity's Developer ID signature with the hardened runt…

Retrieved 2026-11-10
Editor InstallersKnown issueCautionmacOSUUM-156884
"contains a TextureImporter object at version 4, below the supported minimum (10)" warnings are thrown when creating a project from the Multiplayer Third Person Gameplay template
Linked bug report
UUM-156317: "contains a TextureImporter object at version 4, below the supported minimum (10)" warnings are thrown when creating a project from the Multiplayer Third Person Gameplay template

How to reproduce: 1. Create a new project from the "Multiplayer Third person gameplay" template (1.0.9) 2. Observe the Console Expected results: No warnings are thrown on first open Actual results: About 155 "Serialized file "<path>.meta" contains a <Importer> object at version N, below the supported minimum (M). Open and re-save the file to upgrade." warnings are thrown, for 150 template asse…

Retrieved 2026-11-11
Multiplayer FPS/Third Person TemplatesKnown issueCautionUUM-156317
[WinEditor] Play Mode framerate drops significantly when moving the mouse cursor with high polling rate
Linked bug report
UUM-142550: Play Mode framerate drops significantly when moving the mouse cursor with high polling rate

Reproduction steps: 1. Open the attached project "IN-141292" 2. Connect a mouse which supports 1000 Hz polling rate or higher 3. Open scene "SampleScene" 4. Enter Play Mode 5. Move the mouse cursor in Play Mode view (make sure that the view is focused by left-clicking on the view) 6. Observe the result in the graph in the top right corner of the Game view Actual result: The Editor experiences …

Retrieved 2026-11-09
Native Editor Application LifecycleKnown issueCautionUUM-142550
AssetBundle MonoBehaviour shows as missing script in standalone Player when its assembly is loaded at runtime with Assembly.Load
Linked bug report
UUM-159333: AssetBundle MonoBehaviour shows as missing script in standalone Player when its assembly is loaded at runtime with Assembly.Load

How to reproduce: Open the attached "IN-152532" project Open Build Settings and switch the platform to Standalone (Windows or macOS) Build and run the "ReproScene" scene as a standalone Player Observe the logs of the Player Actual result: The MonoBehaviour from the AssetBundle does not bind to the script of the assembly loaded at runtime, so the component shows as a missing script Expected res…

Retrieved 2026-11-11
Scripting RuntimeKnown issueCautionUUM-159333
Player stops responding permanently when scenes are repeatedly switched with SceneManager.LoadSceneAsync
Linked bug report
UUM-156125: Player stops responding permanently when scenes are repeatedly switched with SceneManager.LoadSceneAsync

How to reproduce: Open the attached “IN-153982” project In the Unity editor’s taskbar, select “File” > “Build Profiles” In the “Build Profiles” window, select “Windows” profile Under the “Platform Settings”, expand “Windows Settings” > enable the “Development Build” Click “Build And Run” and wait for around 5 minutes Observe the result in the Player window Actual result: The Player window free…

Retrieved 2026-11-10
Shader SystemKnown issueCautionUUM-156125
RenderPass related Android errors are logged in Logcat and Console when physically rotating the device
Linked bug report
UUM-157974: RenderPass related Android errors are logged in Logcat and Console when physically rotating the device

How to reproduce: 1. Open the attached ‘IN-154071.zip” Project 2. Turn on Development Build and Script Debugging settings (File → Build Profiles ) 3. Build and Run on Android 4. Rotate the Device while the Player is running 5. Observe the Development Console and or Logcat Actual result: RenderPass related errors - “The dimensions or sample count of attachment don’t match RenderPass…” Expected …

Retrieved 2026-11-10
SRP FoundationKnown issueCautionAndroidUUM-157974

Pick your Unity version

Unity Releases compares releases against the version your project is on. Picking it now keeps Compare versions focused on what changes between where you are and where you might be going.