This page contains system requirements and compatibility information for iOS development in Unity.
Unity supports iOS 13 and above. For more information, see PlayerSettings.iOS-targetOSVersionString.
iOS devices support Metal. For more information, see Metal Graphics API.
Unity supports importing a variety of source format sound files. However, when importing these files (with the exception of tracker files), they are always re-encoded to the build target format. By default, this format is Vorbis, though this can be overridden per platform to other formats (ADPCM, MP3, etc.) if required. Vorbis playback provides better compression and quality for iOS compared with MP3 playback.
Unity iOS does not support DXT textures. Instead, ASTC, PVRTC, ETC2, and ETC texture compression are natively supported by iPhone/iPad devices. For more information about iOS texture formats, see texture import settings and texture compression format.