### Known Issues in 2019.2.4f1

*   Cloud Diagnostics: USYM\_UPLOAD\_AUTH\_TOKEN is thrown in Xcode when the Project is built in BatchMode with -runTests and Cloud Diagnostics enabled ([1167025](https://issuetracker.unity3d.com/issues/usym-upload-auth-token-is-thrown-in-xcode-when-the-project-is-built-in-batchmode-with-runtests-and-cloud-diagnostics-enabled))
    
*   Facebook Gameroom: \[Facebook\] Editor throw errors related to SDK after Facebook support installation ([1142442](https://issuetracker.unity3d.com/issues/facebook-editor-throw-errors-related-to-sdk-after-facebook-support-installation))
    
*   Graphics - General: Editor is lagging when modifying material properties ([1094991](https://issuetracker.unity3d.com/issues/hdrp-editor-is-lagging-when-modifying-material-properties))
    
*   IL2CPP: Build fails when compiling a struct with a long array inside it ([1173310](https://issuetracker.unity3d.com/issues/il2cpp-build-fails-when-compiling-a-struct-with-a-long-array-inside-it))
    
*   Linux: Bugreporter is collecting Editor.log from wrong location for 2019.2.0a7+ ([1176211](https://issuetracker.unity3d.com/issues/linux-bugreporter-is-collecting-editor-dot-log-from-wrong-location-for-2019-dot-2-0a7-plus))
    
*   Mobile: \[Android\]\[IL2CPP\] App crashes on 2019.1.0a12 and up on launch if old IL2CPP files from 2019.1.0a11 and below are backuped ([1170543](https://issuetracker.unity3d.com/issues/android-il2cpp-app-crashes-on-2019-dot-1-0a12-and-up-on-launch-if-old-il2cpp-files-from-2019-dot-1-0a11-and-below-are-backuped))
    
*   Package Manager: The Package Manager UI does not refresh when you install or remove packages. ([1148329](https://issuetracker.unity3d.com/issues/the-package-manager-ui-does-not-refresh-when-packages-are-installed-or-removed), 1152868)
    
*   Physics: Crash on block\_remove when changing mesh to Plane in Skinned Mesh Renderer while cloth component attached ([1162918](https://issuetracker.unity3d.com/issues/crash-on-block-remove-when-changing-mesh-to-plane-in-skinned-mesh-renderer-while-cloth-component-attached))
    
*   Physics: Plane with Cloth component is affected by high external force when in Play mode ([1173813](https://issuetracker.unity3d.com/issues/gameobject-with-cloth-component-is-affected-by-high-external-force-when-in-play-mode))
    
*   Scene Management: 2019.3 and 2019.1 Unity versions are significantly slower when entering the play mode ([1161373](https://issuetracker.unity3d.com/issues/2019-dot-3-and-2019-dot-1-streams-are-significantly-slower-when-entering-the-play-mode))
    
*   Scene Management: Enabled Prefab is disabled after upgrading to Improved Prefabs ([1138224](https://issuetracker.unity3d.com/issues/enabled-prefab-is-disabled-after-upgrading-to-improved-prefabs))
    
*   Scene Management: Transform::GetWorldToLocalMatrix crash during first import when accessing Components in Prefabs ([1159905](https://issuetracker.unity3d.com/issues/transform-getworldtolocalmatrix-crash-during-first-import-when-accessing-components-in-prefabs))
    
*   Scripting: Handles.Disc function performance is very slow in Scene View ([1165684](https://issuetracker.unity3d.com/issues/handles-dot-disc-function-performance-is-very-slow-in-scene-view))
    
*   Scripting: \[Android\]\[Mono\]\[IL2CPP\] "Unable to find libc" error thrown when executing certain SslStream constructor ([1022228](https://issuetracker.unity3d.com/issues/android-mono-il2cpp-unable-to-find-libc-error-thrown-when-executing-certain-sslstream-constructor))
    
*   Scripting: \[Templates\] Clamp BlendShapes are set to true by default when creating new projects ([1148638](https://issuetracker.unity3d.com/issues/templates-clamp-blendshapes-are-set-to-true-by-default-when-creating-new-projects))
    
*   Shuriken: WorldCollision crashes when spawning particles with World Collision enabled ([1168859](https://issuetracker.unity3d.com/issues/worldcollision-crashes-when-spawning-particles-with-world-collision-enabled))
    
*   XR: Cardboard projects default to 30 frames per second unless `targetFrameRate` is set to 60. ([1143799](https://issuetracker.unity3d.com/issues/cardboard-projects-default-to-30fps), 1144492)
    

### 2019.2.4f1 Release Notes

#### System Requirements Changes

Nothing changed.

#### Fixes

*   Android: Fixed the floating point render target on Android 4. ([1149616](https://issuetracker.unity3d.com/issues/android-rendertofloattexture-is-not-supported-on-devices-with-android-4), 1177515)
    
*   Animation: Fixed a crash that was introduced due to a missing null check. ([1168299](https://issuetracker.unity3d.com/issues/editor-crashes-at-pptr-operator-on-trying-to-play-legacy-animation-with-event-that-doesnt-exist), 1173429)
    
*   Asset Import: Fixed UI refresh issue after clicking 'search and remap' in materials tab of ModelImporter. (1151346, 1175883)
    
*   Build Pipeline: Storing the list of Resources that are meant for the player only. (1174623, 1174624)
    
*   Graphics: Fixed an issue with the debug rendering happening out of BeginFrame/EndFrame on Dx12. ([1162859](https://issuetracker.unity3d.com/issues/d3d12-editor-crashes-on-trying-to-create-a-2d-texture-using-progrid), 1163518)
    
*   Timeline: Fixed a precision error on the duration of infinite tracks. ([1156723](https://issuetracker.unity3d.com/issues/timeline-timeline-animation-resets-to-the-first-frame-if-animations-track-last-frame-is-on-an-even-number), 1180458)
    
*   Timeline: Fixed an exception that was thrown when calling TrackAsset.CreateMarker() with a marker that implements INotification if the track does not support notifications. (1150248, 1180467)
    
*   Timeline: Fixed an issue where copying clips without ExposedReferences causing the scene to dirty. (1144469, 1179709)
    
*   Timeline: Fixed an issue where playhead was being moved when applying undo while recording. ([1154802](https://issuetracker.unity3d.com/issues/timeline-time-slider-resets-to-frame-0-when-using-ctrl-z-after-making-any-changes), 1180463)
    
*   Timeline: Fixed an issue where the context menu for inline curves keys would not open on MacOS. ([1158584](https://issuetracker.unity3d.com/issues/timeline-in-line-curve-keys-no-longer-have-a-contextual-menu-for-keys), 1179711)
    
*   Timeline: Fixed an issue where the duration mode was not reverting from "Fixed Length" to "Based On Clips" properly. ([1154034](https://issuetracker.unity3d.com/issues/timeline-duration-mode-doesnt-change-back-to-based-on-clip-after-changing-to-fixed-length), 1180456)
    
*   Timeline: Fixed an issue where two GatherProperties call were made when switching between two PlayableDirectors. (1159036, 1160428)
    
*   Timeline: Fixed an issue with minimum clip duration not being frame aligned. ([1156602](https://issuetracker.unity3d.com/issues/there-is-a-slight-offset-when-setting-timeline-clips-duration-to-1-frame), 1180464)
    
*   Timeline: Fixed the preview mode being reenabled when warnings change on tracks. ([1151381](https://issuetracker.unity3d.com/issues/cannot-exit-timeline-preview-mode-on-a-combination-of-activation-track-and-signal-track), 1180466)
    
*   Timeline: Fixed warnings about localEulerAnglesRaw when using RectTransform. ([1151100](https://issuetracker.unity3d.com/issues/timeline-animation-track-throws-warning-about-registering-localeuleranglesraw-on-animating-rotation), 1180462)
    
*   UI Elements: Fixed an issue where Calling BindProperty on a PropertyField doesn't work as intended. (1174517, 1179375)
    
*   UI Elements: Fixed an issue with the url() function in USS not working with paths containing space.
    
*   Video: Fixed an issue where a seek to a non-zero frame and then immediately a seek to 0 would Video freezes for a while. ([1162426](https://issuetracker.unity3d.com/issues/android-videoplayer-when-one-makes-a-seek-to-a-non-zero-frame-and-then-immediately-a-seek-to-0-video-freezes-for-a-while), 1171140)
    
*   Video: Fixed an issue where seeking forward and backwards in a video causes sound delays on Android. (1167452, 1171130)
    
*   Windows: Fixes UnityWebRequest so it'll honor the network Proxy 'bypass list' from Windows configuration ([1165762](https://issuetracker.unity3d.com/issues/windows-unity-doesnt-acknowledge-the-proxy-exclusion-list), 1177679)
    
*   XR: Fixed a memory issue in HoloLens SurfaceObserver. (1176047, 1176063)
    
*   XR: Fixed an incorrect early update ordering for Tango platforms (ARCore). (1175133, 1178432)
    

#### System Requirements

##### For development

**OS**: Windows 7 SP1+, 8, 10, 64-bit versions only; macOS 10.12+. (Server versions of Windows & OS X are not tested.)

**CPU**: SSE2 instruction set support.

**GPU**: Graphics card with DX10 (shader model 4.0) capabilities.

The rest mostly depends on the complexity of your projects.

###### Additional platform development requirements:

*   iOS: Mac computer running minimum macOS 10.12.6 and Xcode 9.4 or higher.
    
*   Android: Android SDK and Java Development Kit (JDK); IL2CPP scripting backend requires Android NDK.
    
*   Universal Windows Platform: Windows 10 (64-bit), Visual Studio 2015 with C++ Tools component or later and Windows 10 SDK
    

##### For running Unity games

Generally content developed with Unity can run pretty much everywhere. How well it runs is dependent on the complexity of your project. More detailed requirements:

*   Desktop:
    
    *   OS: Windows 7 SP1+, macOS 10.12+, Ubuntu 12.04+, SteamOS+
    *   Graphics card with DX10 (shader model 4.0) capabilities.
    *   CPU: SSE2 instruction set support.
*   iOS player requires iOS 9.0 or higher.
    
*   Android: OS 4.1 or later; ARMv7 CPU with NEON support or Atom CPU; OpenGL ES 2.0 or later.
    
*   WebGL: Any recent desktop version of Firefox, Chrome, Edge or Safari.
    
*   Universal Windows Platform: Windows 10 and a graphics card with DX10 (shader model 4.0) capabilities