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Unity 2020 LTS provides a stable foundation for projects that are in production or about to ship. Unity 2020 LTS stream release has the same feature set as the 2020.2 Tech stream release.

We’re committed to supporting 2020.3 LTS releases with biweekly updates until mid-2022, after which updates will be monthly until March 2023 (two years after the initial release date). These updates will only cover usability fixes aimed at improving the stability of the product to enable users to ship their projects.

Unity 2019.4 is now the legacy LTS; it will be updated monthly until it reaches the end of its support cycle in spring 2022.

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LTS Release 2018.4.2f1

Released: 10 June 2019

We are happy to announce Unity 2018.4.2f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

2018.4.2f1 Release Notes

Improvements

  • XR: Added GPU Profiler support for Oculus Quest and Oculus Go.

  • XR: Updated Vuforia to version 8.1.11.

Fixes

  • 2D: Fixed sprite Atlases being packed by entering Play Mode when Sprite Packer Mode is set to "Enabled for builds". (1136349, 1148721)

  • Animation: Fixed a crash when animating optimized hierarchies with constant animated properties. (1142636, 1150606)

  • Asset Bundle: Fixed an issue where an "Inconsistent asset" error was logged during BuildPipeline.BuildAssetBundles. (1138140, 1139331)

  • Asset Import: Fixed the root node of a model importer preset not visible and editable. (1144441, 1150228)

  • Build Pipeline: Fixed assets in Editor/Resources folders sometimes being included in builds. (1138237, 1150572)

  • Build Pipeline: Fixed Empty Project builds for Mac/Win/Linux Standalone containing extra ~4MB of doc .xml files. (1112215, 1125590)

  • Editor: Fixed "ArgumentException: Could not find item with id:" that could sometimes occurs when modifying points in the LineRenderer editor. (1143748, 1148722)

  • Editor: Fixed editor crashing with Transform::GetPosition when duplicating Prefabs with Configurable Joints. (1137347, 1152740)

  • Editor: Fixed editor not reacting to .meta file changes regarding Asset Bundles when .meta file was changed while the editor is exiting. (1126293, 1141492)

  • Editor: Fixed GameObject preview flickering on Mac. (1132433, 1150246)

  • Editor: Fixed host local address not validated on GET HTTP request. (1146895, 1152793)

  • Editor: Fixed reverting files in Collab occasionally displaying a blank message. (1151178, 1151183)

  • Graphics: Fixed editor and etandalone hangs after shutdown when running C# Jobs within a ScriptableRenderPipeline. (1142765, 1152343)

  • Graphics: Fixed editor crashing at MaterialScripting::Lerp when Renderer.material.Lerp() has a null material. (1093930, 1100678)

  • Graphics: Fixed hang during shutdown which could happen when running C# Jobs within a ScriptableRenderPipeline. (1142765, 1150775)

  • IL2CPP: Corrected handling of exceptions in some try/finally situations. (1136256, 1152172)

  • IL2CPP: Fixed AppleTlsProvider error on iOS when Strip Engine Code is enabled caused by incorrectly falling back to AppleTlsProvider. (1134343, 1154767)

  • IL2CPP: Handled the this reference passed to a method via an in parameter. (1143749, 1160357)

  • Mobile: Fixed unconditionally discarding AA depth. (1009642, 1145255)

  • OSX: Fixed Empty Project builds for Mac/Win/Linux Standalone contain extra ~4MB of doc .xml files. (1112215, 1125589)

  • OSX: Fixed smooth scrolling not supported when a trackpad or magic mouse is being used. (1144634, 1150081)

  • Particles: Ensured Force Fields belonging to disabled Game Objects do not affect any Particle Systems. (1149364, 1156006)

  • Particles: Ensured particle trails start from exact particle spawning position. (1147999, 1156008)

  • Particles: Fixed flickering sub-emitter trails if sub-emitter particles are cleared before Particle System finishes playing. (1146677, 1156009)

  • Particles: Fixed particle random numbers not being the same on all platforms. (1138802, 1148728)

  • Particles: Fixed the glitches when rendering trails and using Custom Simulation Space together. (1092072, 1156005)

  • Particles: Fixed the jitter when updating position in LateUpdate and using Custom Simulation Space. (1149016, 1156010)

  • Physics: Fixed Raycasts hitt the second layer of the Mesh Collider when the first layer is thin. (1136868, 1144347)

  • Physics: Fixed Unity crashing when using C# batched Raycast requests containing invalid direction data (0,0,0). (1134317, 1144345)

  • Prefabs: Ensured duplicated prefabs retain transform values and other overrides. (1132860, 1152360)

  • Prefabs: Fixed crash when duplicating prefabs with ConfigurableJoints. (1137347, 1152361)

  • Prefabs: Fixed editor crashing when selecting a prefab variant. (1113802, 1152733)

  • Prefabs: Fixed Game Objects being moved to different place when duplicating prefabs. (1132860, 1152739)

  • Prefabs: Fixed importing badly broken prefab variants where components could be assigned to multiple GameObjects. (1113802, 1152363)

  • Profiler: Fixed incorrect memory reported for render texture. (1094084, 1151143)

  • SceneManager: Fixed sprites referencing both the original Sprite assets and Sprite Atlas resulting in increased memory usage. (1135495, 1151116)

  • Timeline: Fixed timelines not being played correctly when building a player with Mono and Managed Stripping Level set higher than Low. (1133182, 1150585)

  • Video: Fixed crash when trying to Play a VideoPlayer when running with -nographics. (1150850, 1155990)

  • VR: Fixed head-tracking and rendering for in-editor remoting to HoloLens devices. (1138473, 1144519)

  • Windows: Fixed documentation summary in Visual Studio not being shown. (1148065, 1150451)

  • Windows: Fixed Standalone Player remaining paused/inactive after using WIN+D shortcut to restore the app window. (1117930, 1147082)

  • XR: Fixed app memory leak when open for extended periods of time. (1138251, 1149352)

  • XR: Fixed assert in gesture source states when asking for sources states and there are none. (1152462, 1156186)

  • XR: Fixed Camera.Render() incorrectly rendering to a RenderTexture when VR is enabled. (986355, 1158264)

  • XR: Fixed crash when transitioning to Windows Mixed Reality VR Mode from non-VR. (1150910, 1152533)

  • XR: Fixed Google VR package removal when Cardboard or Daydream is still in the VR Device list. (1127443, 1139416)

  • XR: Fixed OpenVR package failing to download when Virtual Reality is enabled for new projects. (1082031, 1139418)

  • XR: Prevented potential null pointer access in Windows Mixed Reality. (1152855, 1152860)

LTS Release 2017.4.28f1

Released: 3 June 2019

We are happy to announce Unity 2017.4.28f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

Release Notes

  • Fixed hang due to job threads occasionally going idle even if they have jobs assigned to them.
  • 2D: Fixed crash on "SpriteAtlas::ReconcilePackedSprites" during AssetBundle build while repacking Sprite Atlases. (1142859)
  • Android: Fixed crash when upgrading an existing app to ARM64. (1157347)
  • Build Pipeline: Fixed Added a call to clean up high memory usage in BuildPipeline.BuildAssetBundles to avoid a crash due to out of memory. (1129899)
  • Editor: Changed editor preference behavior to only update modified values in the plist file on MacOS. (1146446)
  • Editor: Fixed Drag and dropping doesn't always work. (1136897)
  • Editor: Fixed Mouse move events affect Editor UI performance. (973842)
  • Editor: Fixed Restrict Editor debugging to clients on same machine. (1140292)
  • GI: Fixed the environment lighting and skybox are not updated. (1156360)
  • Graphics: Fixed crash in AssetBundle build while repacking Sprite Atlases. (1142855)
  • Graphics: Fixed issue where ETC Crunch decoder would crash on iOS. (1152384)
  • IL2CPP: Corrected an intermittent crash when a managed exception occurs on a back ground thread while the process is shutting down. (1152376)
  • iOS: Fixed AudioMixerPlayable and AudioPlayable crash while terminating iOS application. (1118388
  • iOS: Fixed player crashing at decode_alpha_selectors_etc when decoding crunched ETC texture. (1140135)
  • Mobile: Fixed [Razer Phone] TargetFPS and vSyncCount having no effect on the actual FPS. (1136329)
  • PS4: Fixed indirect draws sometimes resulting in softhang. (1148616)
  • Windows: Fixed issue where high-poll-rate mice were causing performance degradation in the Editor on Windows. (1146052)

LTS Release 2018.4.1f1

Released: 28 May 2019

We are happy to announce Unity 2018.4.1f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

Fixes

  • 2D: Fixed an issue where sprites could disappear while moving in the tile palette. (1133841, 1151096)

  • Android: Fixed "Error walking path" errors thrown after completing a build and having Crash and Exception Reporting enabled. (1108365, 1154266)

  • Android: Fixed black bar shown on Android9+ devices without notch when in non-fullscreen mode. (1144669, 1148771)

  • Android: Fixed occasional crash on Moto G when using split binary and loading Asset Bundles from StreamingAssets. (1145139, 1150056)

  • Android: Fixed VideoPlayer hanging or starting from the beginning at double speed when seeking on Android. (1141913, 1150101)

  • Animation: Fixed animation jobs SetPosition/SetLocalPosition not working on humanoid transform for rig with translation DoF ON. (1103108, 1150538)

  • Asset Import: Fixed an issue where some kinds of assets might not refresh after an Editor restart using ADB v1. (1140289, 1149024)

  • Asset Pipeline: Fixed crash/data corruption when loading multiple asset bundles concurrently. (1140019, 1148846)

  • Audio: Fixed an audio playables crash at shutdown. (1107760, 1127465)

  • Editor: Fixed an issue where meshes passed to static batcher can arrive in a different order on different PCs. This will help ensure that asset bundle generation is deterministic for static batched mesh. (1098137, 1149327)

  • Editor: Fixed collab disabling itself when network disconnects. (1095539, 1149138)

  • GI: Fixed we don't check if a point is behind the camera or not. These point should not be included in the selection. (1129856, 1143128)

  • Graphics: Fixed missing draws when using an uninitialized RenderTexture. (1107219, 1123844)

  • iOS: Fixed crash in "ParkFMODResource() at AudioMixerPlayable" or "ReleaseChannelGroupsVisitor() at AudioPlayable". (1107760, 1118388)

  • OSX: Fixed the icon at 128x128 being corrupt in MacOS build. (1038984, 1132658)

  • Package Manager: Fixed an issue where package tarball files could not be extracted when the target path contained non-latin characters. (1124257, 1144685)

  • Player: Libpng library upgraded to version 1.6.36. (1141755, 1154270)

  • Player: Zlib library upgraded to version 1.2.11. (1141751, 1148306)

  • Prefabs: Fixed opening a broken legacy Prefab asset with an orphan GameObject shows a recursive dialog (hangs the Editor). (1115859, 1148996)

  • SceneManager: Fixed CameraStackRenderingState::ReleaseResources crashing when exiting play mode. (969092, 978066)

  • Scripting: Fixed issue with "Menu can't be checked because it doesn't exist" warning being emitted when deleting a checked menu item script. (1136169, 1136821)

  • Scripting Upgrade: Fixed AssemblyUpdater Mono.Cecil.AssemblyResolutionException exception in some scenarios. (1141972, 1154294)

  • Services: Ensure symbols are captured correctly on Android. (1108365, 1140379)

  • Services: Ensure symbols are captured correctly on iOS. (1109548, 1140376)

  • Services: Fixed crash in signal handler on Android IL2CPP ARM64. (1038107, 1154264)

  • Terrain: Fixed the terrain inspector being disabled even after the initial inspector was closed. (1117658, 1143635)

  • Timeline: Fixed timeline with an disabled Audio Source causes Editor Crash when exiting play mode. (930758, 957973)

  • Universal Windows Platform: Fixed a crash when a scene contains a timeline with an animation playing in it on .NET scripting backend. (1141825, 1154297)

  • Universal Windows Platform: Fixed an issue where scripts in Unity were compiled against incorrect .NET profile on .NET scripting backend. This would result in errors like "The type 'Dns' exists in both 'System.Net.NameResolution, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' and 'WinRTLegacy, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'". (1144565, 1154295)

  • Version Control: Fixed Smart Merge producing duplicate data for some arrays. (1139083, 1150382)

  • Video: Fixed VideoPlayer time/frame becoming invalid during seek operation. (1154368, 1154755)

  • Windows: Fixed issue where high-poll-rate mice were causing performance degradation in the Editor on Windows. (1117360, 1144459)

  • XR: Fixed CommandBuffers not work w/ MSAA and VR. (906203, 1154269)

  • XR: Fixed potential hang on exit issue with HoloLens applications when OS signals suspend during exit. (1124435, 1150682)

  • XR: Fixed upside-down rendering in MultiPass on Rift with Windows OpenGL Standalone player. (1016162, 1154268)

LTS Release 2017.4.27f1

Released: 10 May 2019

We are happy to announce Unity 2017.4.27f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

2017.4.27f1 Release Notes

Fixes

  • 2D: Fixed an issue where sprites could disappear while moving in the tile palette. (1133841, 1140232)

  • Android: Fixed an issue on Mali GPUs where font textures would occupy 4 times more memory than on other GPUs. (1132219, 1134228)

  • Android: Fixed an issue with ASTC compression on mobile. (1059665, 1141311)

  • Android: Fixed issue where Unity logo in splash screen was shown as a black rectangle on Android 4.4 devices. (1100390, 1129749)

  • Android: Fixing problem with detecting latest installed build tools version. (1094262, 1132183)

  • GI: Fixed generating UV2 with UnityEditor.Unwrapping.GenerateSecondaryUVS failing when generating for models with more than 64k vertices. (1131979, 1134708)

  • Graphics: Fixed Skybox field in Lighting Window not showing the correct value when working with multiple scenes. (916245, 1140744)

  • Particles: Fixed newly emitted particle sizes not being updated when using Simulate and the restart flag is true. (1104199, 1123852)

  • Particles: Fixed Simulate not updating sub-emitters particles when restart flag was false. (1104199, 1123852)

  • Player: Libpng library upgraded to version 1.6.36. (1141755, 1148312)

  • Unity Test Runner: Fixed filtering in the TestRunner while running tests from the batch mode. (1008728, 1051195)

  • Web: Fixed WebViewTests causing editor to crash on exit. (1038514, 1056726)

  • XR: Fixed a CPU core configuration issue on Oculus Quest that resulted in too many job threads spinning up. (1141670, 1141677)

LTS Release 2018.4.0f1

Released: 10 May 2019

We are happy to announce Unity 2018.4.0f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

2018.4.0f1 Release Notes

Fixes

  • Android: Added support for supplementary Unicode characters for UnitySendMessage. (1059652)
  • Android: Fixed Android Screen.safeArea coordinate system to be in screen space. (1148415)
  • Android: Fixed gradle build failure with Android SDK Build-Tools 29-rc1. (1142929)
  • Animation: Fixed float values not being animated when PPtr references were also in animated bindings. (1143168)
  • Animation: Fixed integer values not being animated when PPtr references were also in animated bindings. (1079856)
  • Asset Import: Fixed .meta files with a "UTF-8" BOM causing the YAML parser to freeze Unity. (1145011)
  • Asset Import: Fixed issue with blendshape normals being recalculated when the blendshape normal import option is set to 'None'. (1140797)
  • Audio: Fixed clip preview autoplay in the object selector. (1126745)
  • Editor: Fixed bug that disabled the availability of having rsp files inside Packages correctly. (1138462)
  • Editor: Fixed crash when creating Presets of AudioManager settings and then modifying AudioManager. (1141203)
  • Editor: Fixed incorrect URL being shown in UV overlap warning message. (1124652)
  • Editor: Fixed the preview pane in the object selector.
  • Facebook: Fixed Facebook GameRoom sometimes faiing when target is Standalone. (1144847)
  • GI: Fixed race condition in Enlighten data loading during additive scene loading that leads to a crash in the standalone player. (1141632)
  • Graphics: Fixed Texture2DMSArray SRV on DX11. (1130212)
  • IL2CPP: Added support for the MethodImplOptions.NoOptimization C# attribute. (1124061)
  • IL2CPP: Fixed a build failure that would occur when targeting UWP w/ il2cpp while using a Managed Stripping Level of High. (1137227)
  • IL2CPP: Fixed an intermittent crash when a managed exception occurs on a back ground thread while the process is shutting down.
  • IL2CPP: Fixed some assemblies missing symbol files after building with the Medium or High Managed Stripping Level. (1142732)
  • IL2CPP: Fixed the overwriting of a copy of a generic by ref argument that uses specifically crafted IL bytecode. (1140509)
  • iOS: Fixed issue where app hangs when synchronously loading asset bundles. (1115979)
  • iOS: Fixed player crash at decode_alpha_selectors_etc when decoding a crunched ETC texture. (1139387)
  • iOS: Fixed plugins not being imported correctly on iOS when "Automatically Add Capabilities" is disabled. (1142626)
  • Mobile: Fixed TargetFPS and vSyncCount has no effect on the actual FPS on Razer phones. (1078663)
  • PS4: Fixed indirect draws occasionally causing a soft hang. (1148617)
  • Testing: Fixed TearDown and UnityTearDown getting called on base class first. (1143077)
  • UI Elements: Fixed script field not editable when script is missing. (1144332)
  • Windows: Fixed maximized Standalone window going to fullscreen. (1137204)
  • XR: Fixed a CPU core configuration issue on Oculus Quest that resulted in too many job threads spinning up. (1150332)
  • XR: Improved performance for WIndows MR by using newer presentation APIs from Microsoft. (1148816)

LTS Release 2017.4.26f1

Released: 24 April 2019

We are happy to announce Unity 2017.4.26f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

2017.4.26f1 Release Notes

Fixes

  • Android: Fixed crash when AndroidJavaProxy is invoked while app is in background. (1126040, 1141478)

  • Android: Fixed keyboard not opening when an InputField is touched in API Level 28. (1143344)

  • Cache Server: Fixed duplicate downloads of assets from Cache Server. (1084628)

  • Physics: Fixed Root Motion slowdown introduced in 2017.2. (984547, 1033423)

  • SceneManager: Fixed a Race condition in TransformAccessArray. (1133800)

  • Scripting: Fixed crash when a MonoBehaviour contains any serializable string attribute that contains malformed utf16. (1134364)

LTS Release 2017.4.25f1

Released: 8 April 2019

We are happy to announce Unity 2017.4.25f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

2017.4.25f1 Release Notes

Fixes

  • Android: Fixed accessibility warning when publishing to Google Play. (1094743)

  • Android: Fixed binary shaders not being cached on Android devices with Adreno GPUs. (1129357)

  • Editor: Fixed crash due to double Dispose call in a TextGenerator. (1129463)

  • Graphics: Fixed editor crash when illegal position is introduced to graphics engine. (1115965)

  • iOS: Fixed occasional crash when destroying WebCamTexture. (1090053)

  • Package Manager: Fixed missing Editor folder in PackageManager directory if installed through DownloadAssistant. (1133409)

  • Package Manager: Removed unnecessary files packaged with the Unity installer. (1131025)

  • Particles: Fixed a crash in the ParticleGeomWrite function. (1136510)

  • Scripting: Improved performance when calling GameObject.AddComponent for a nested MonoBehaviour class inside a namespace. (1085304, 1118038)

  • Shaders: Fixed shader compiler emitting the same struct definition each time it sees it, regardless of whether it was emitted already or not. (1099165)

  • UI: Fixed API inconsistency with no support of uv2 and uv3 inside the VertexHelper class. (1117237)

LTS Release 2017.4.24f1

Released: 22 March 2019

We are happy to announce Unity 2017.4.24f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

2017.4.24f1 Release Notes

Fixes

  • Android: Fixed an issue loading assets from OBBs when a Unity generated AndroidManifest.xml is reused in a project. (1061304, 1069217)

  • Android: Fixed an issue where using AndroidJavaProxy multiple times per frame could cause a global reference table overflow. (1044728)

  • Android: Fixed Environment.TickCount returning negative value on Android 8.0+. (1108927)

  • Android: Updated JNI Bridge to correctly handle VideoPlayer buffers after SDK version upgrade. (1121718)

  • Build Pipeline: Prevented crash when invoking the build pipeline from a build pipeline user callback. (1129944)

  • Camera: Fixed case where editor would crash when rendering with an invalid occlusion camera. (1089008)

  • Graphics: Fixed deletion of external texture not clearing internal texture binding caches. (1094803)

  • Graphics: Optimised cluster rendering by reducing network packet send latency. (965251, 1131275)

  • iOS: Fixed an issue where visual artifacts could appear when using the Deferred Rendering Path on Metal. (996086, 1129492)

  • Mobile: Fixed Android development build keyboard display over the locked screen. (946796, 1076660)

  • Scripting: Added support for events in Script Updater. (1069340)

  • WebGL: Fixed audio not working in Safari after Apple added auto-play restrictions (requires clicking on content to enable audio). (1089060)

LTS Release 2017.4.23f1

Released: 11 March 2019

We are happy to announce Unity 2017.4.23f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

2017.4.23f1 Release Notes

Fixes

  • Android: Fixed problems with manifest file and gradle templates after updating gradle plugin to 3.2. (1118286)

  • Android: Undeprecated AndroidTargetDevice.

  • Animation: Fixed crash when playing a playable graph and setting an override controller. (1087755)

  • Asset Bundles: Fixed error when loading an object from an asset bundle on the first frame of a scene load operation under certain conditions. (1094045)

  • Asset Database: Fixed an issue where scenes with a period in the name could not be loaded by asset bundles. (1022819)

  • Asset Pipeline: Fixed Asset Bundles not loading scenes if the scene had a period in its name. (1022819, 1104962)

  • Asset Pipeline: Fixed non-deterministic data in asset bundle when using Prebake Collision Mesh. (1116173)

Changeset: f80c8a98b1b5

LTS Release 2017.4.22f1

Released: 4 March 2019

We are happy to announce Unity 2017.4.22f1. The release notes and the corresponding issue tracker link for issues fixed in this release are as shown below.

Unity Editor Download Assistant

Component Installers Windows

Component Installers Mac

Component Installers Linux

Fixes

Changset: eb4bc6fa7f1d

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