Install this version with Unity Hub.
Select the runtime platforms of your choice from the list below (the desktop runtime is included as standard) or, to install the full complement of runtime platforms, use the download assistant installer above.
Known Issues in 2021.2.18f1
Asset - Database: Texture size increased on first build when 'Compress Textures/Assets on Import' is enabled (1397965)
Customer QA Onboarding: Spaces and symbols of the Project name are changed to hyphens causing "Invalid characters" warning in the Bundle Identifier (1412412)
DirectX11: Crash on GfxDeviceD3D11Base::ResolveDepthIntoTexture when opening the project (1408785)
DOTS: "IndexOutOfRangeException" errors appear when entering Play Mode if using "AsDeferredJobArray" (1395710)
Metal: Consistent EditorLoop 5-10ms spikes when using Metal API (1378985)
Mono: [Android] "Found plugins with same names" error is thrown when building on Android with duplicate .dll files (1373388)
Progressive Lightmapper: [GPU PLM] Crash due to out of bounds access violation in PowerSampling after enabling auto mode at the end of bake on AMD GPU (1379762)
Scene/Game View: Camera resolution is set to default when opening the Editor (1378321)
Shadows/Lights: Scene is brighter in Standalone player if it was open in the Editor at build time (1375015)
uGUI: Prefab is glitchy while editing in Prefab Mode when parent Canvas Render Mode is set to Screen Space - Camera (1394756)
WebGL: WebGL Input System interactions are delayed or played preemptively when the project is built (1405517)
2021.2.18f1 Release Notes
- EmbeddedLinux: A port field is now exposed for the managed debugger in Build settings when Debugging script is checked.
- Physics: Added: All the physics batch queries can now run in physics scenes other than default.
Asset Bundles: Fixed a regression where skinned mesh was no longer being compressed. (1391542)
Audio: Fixed crash on AudioMixer::EnsureValidRuntime when entering Play mode. (1394571)
Editor: Ensure we do not try to save the layout file if switching from a mode using dynamic layout. (1382281)
Editor: Fixed an issue causing C# serializable generic types to incorrectly contain data for editor only fields in serialized data when in a player context.
Graphics: Fixed null rp asset when the selection is being canceled. (1354374)
IL2CPP: Correct the logging of UnityLinker and IL2CPP messages in the editor log when UNITY_EXT_LOGGING is enabled. (1386302)
iOS: Fixed an issue where CoreText warning spammed on iOS15. (1397966)
Package Manager: Show license error icon and banner with descriptive error message. (1396272)
Prefabs: Fixed empty error logs when importing Trees. (1354333)
Shaders: Fixed an assert when rendering a mesh using a material setup with CopyPropertiesFromMaterial. (1387200)
Shaders: Fixed keywords not present in the shader being discarded by the material. (1380745)
Terrain: Fixed an issue where material keyword APIs don't list keywords when using a newly imported SpeedTree. (1398133)
UI Toolkit: Fixed sprite 9-slices that didn't take the pixels-per-unit value into account. (1373597)
WebGL: Fixed a crash when using AudiClip.priority and AudioSettings.Reset. (1385590)
Package changes in 2021.2.18f1