Requirements

Platform Requirements

Requirement	Version
iOS	15.0+
Xcode	15.0+
Swift	5.9+
NCKit (recommended)	1.2.1+
Device architecture	arm64
Simulator architectures	arm64, x86_64 (via ios-arm64_x86_64-simulator)

Intel Mac simulator (1.2.1+)

From NCKit 1.2.1, the XCFramework includes an ios-arm64_x86_64-simulator slice. Intel Mac simulators run natively on x86_64 without Rosetta. Use 1.2.1 or newer — see v1.2.1 changelog.

Architecture Details

NCKit.xcframework/                        # 1.2.1+
├── ios-arm64/                            # Physical iOS devices (iPhone, iPad)
│   └── NCKit.framework/
└── ios-arm64_x86_64-simulator/           # iOS Simulator (Apple Silicon + Intel)
    └── NCKit.framework/

The ios-arm64_x86_64-simulator slice is a universal simulator binary:

Simulator host	Architecture	Supported (1.2.1+)
Apple Silicon Mac	arm64	Yes
Intel Mac	x86_64	Yes

Older releases (before 1.2.1)

Releases before 1.2.1 shipped ios-arm64-simulator only. Intel Mac simulators required Rosetta or a physical device. See Simulator troubleshooting.

Dependencies

NCKit has no external Swift dependencies. The following Apple frameworks are used internally:

Framework	Usage
AVFoundation	Audio file decoding, format conversion, AVAudioConverter
Accelerate	SIMD math operations in the DSP pipeline
Foundation	File system, Bundle, URL handling

These are linked automatically via the podspec and xcframework metadata. No manual linking required for SPM or CocoaPods users.

Model File

NCKit bundles NCKit_model.tar.gz inside NCKit.xcframework. The model is approximately 8.5 MB and is embedded in both device and simulator slices.

NCKitModelLocator.modelTarGzURL() handles extracting the model to a writable path at runtime.

See How to Use.