# USBDriverKit Macros ## Topics ### Macros [`#define IOUSBHostFamilyBit(bit)`](/documentation/USBDriverKit/IOUSBHostFamilyBit) [`#define IOUSBHostFamilyBitRange(start, end)`](/documentation/USBDriverKit/IOUSBHostFamilyBitRange) [`#define IOUSBHostFamilyBitRange64(start, end)`](/documentation/USBDriverKit/IOUSBHostFamilyBitRange64) [`#define IOUSBHostFamilyBitRangePhase(start, end)`](/documentation/USBDriverKit/IOUSBHostFamilyBitRangePhase) [`#define iokit_usb_codemask`](/documentation/USBDriverKit/iokit_usb_codemask) [`#define iokit_usbhost_err(message)`](/documentation/USBDriverKit/iokit_usbhost_err) [`#define iokit_usbhost_group`](/documentation/USBDriverKit/iokit_usbhost_group) [`#define iokit_usbhost_msg(message)`](/documentation/USBDriverKit/iokit_usbhost_msg) [`#define iokit_usblegacy_err_msg(message)`](/documentation/USBDriverKit/iokit_usblegacy_err_msg) [`#define iokit_usblegacy_group`](/documentation/USBDriverKit/iokit_usblegacy_group) [`#define kAppleCurrentExtra`](/documentation/USBDriverKit/kAppleCurrentExtra) [`#define kAppleCurrentExtraInSleep`](/documentation/USBDriverKit/kAppleCurrentExtraInSleep) [`#define kAppleExternalConnectorBitmap`](/documentation/USBDriverKit/kAppleExternalConnectorBitmap) [`#define kAppleMaxPortCurrent`](/documentation/USBDriverKit/kAppleMaxPortCurrent) [`#define kAppleMaxPortCurrentInSleep`](/documentation/USBDriverKit/kAppleMaxPortCurrentInSleep) [`#define kIOUSB20BitrateFull`](/documentation/USBDriverKit/kIOUSB20BitrateFull) [`#define kIOUSB20BitrateHigh`](/documentation/USBDriverKit/kIOUSB20BitrateHigh) [`#define kIOUSB20BitrateLow`](/documentation/USBDriverKit/kIOUSB20BitrateLow) [`#define kIOUSBBillboardEntitlement`](/documentation/USBDriverKit/kIOUSBBillboardEntitlement) [`#define kIOUSBHostControllerInterfaceEntitlement`](/documentation/USBDriverKit/kIOUSBHostControllerInterfaceEntitlement) [`#define kIOUSBHostVMEntitlement`](/documentation/USBDriverKit/kIOUSBHostVMEntitlement) [`#define kIOUSBTransportDextEntitlement`](/documentation/USBDriverKit/kIOUSBTransportDextEntitlement) [`#define kUSBHostControllerPropertyControlRequestPolicy`](/documentation/USBDriverKit/kUSBHostControllerPropertyControlRequestPolicy) [`#define kUSBHostControllerPropertyDeferRegisterService`](/documentation/USBDriverKit/kUSBHostControllerPropertyDeferRegisterService) [`#define kUSBHostControllerPropertyInterruptRMBS`](/documentation/USBDriverKit/kUSBHostControllerPropertyInterruptRMBS) [`#define kUSBHostControllerPropertyIsochronousRMBS`](/documentation/USBDriverKit/kUSBHostControllerPropertyIsochronousRMBS) [`#define kUSBHostControllerPropertyPortWakeSourcesPolicy`](/documentation/USBDriverKit/kUSBHostControllerPropertyPortWakeSourcesPolicy) [`#define kUSBHostControllerPropertySoftRetryPolicy`](/documentation/USBDriverKit/kUSBHostControllerPropertySoftRetryPolicy) [`#define kUSBHostControllerPropertyStreamPolicy`](/documentation/USBDriverKit/kUSBHostControllerPropertyStreamPolicy) [`#define kUSBHostControllerPropertyTierLimit`](/documentation/USBDriverKit/kUSBHostControllerPropertyTierLimit) [`#define kUSBHostControllerPropertyUSB2LPMPolicy`](/documentation/USBDriverKit/kUSBHostControllerPropertyUSB2LPMPolicy) [`#define kUSBHostControllerPropertyUSB3LPMPolicy`](/documentation/USBDriverKit/kUSBHostControllerPropertyUSB3LPMPolicy) [`#define kUSBHostControllerPropertyUSB4LPMPolicy`](/documentation/USBDriverKit/kUSBHostControllerPropertyUSB4LPMPolicy) [`#define kUSBHostDevicePropertyDeviceUDID`](/documentation/USBDriverKit/kUSBHostDevicePropertyDeviceUDID) [`#define kUSBHostDevicePropertyEnumerationState`](/documentation/USBDriverKit/kUSBHostDevicePropertyEnumerationState) [`#define kUSBHostDevicePropertyPowerSinkCapability`](/documentation/USBDriverKit/kUSBHostDevicePropertyPowerSinkCapability) [`#define kUSBHostDevicePropertySignature`](/documentation/USBDriverKit/kUSBHostDevicePropertySignature) [`#define kUSBHostDevicePropertyStreamsSupported`](/documentation/USBDriverKit/kUSBHostDevicePropertyStreamsSupported) [`#define kUSBHostDevicePropertyTunnel`](/documentation/USBDriverKit/kUSBHostDevicePropertyTunnel) [`#define kUSBHostInterfacePropertyNumEndpoints`](/documentation/USBDriverKit/kUSBHostInterfacePropertyNumEndpoints) [`#define kUSBHostInterfacePropertyString`](/documentation/USBDriverKit/kUSBHostInterfacePropertyString) [`#define kUSBHostInterfacePropertyStringIndex`](/documentation/USBDriverKit/kUSBHostInterfacePropertyStringIndex) [`#define kUSBHostMatchingPropertyDeviceReleaseNumberRange`](/documentation/USBDriverKit/kUSBHostMatchingPropertyDeviceReleaseNumberRange) [`#define kUSBHostMessageConfigurationSet`](/documentation/USBDriverKit/kUSBHostMessageConfigurationSet) [`#define kUSBHostMessageControllerException`](/documentation/USBDriverKit/kUSBHostMessageControllerException) [`#define kUSBHostMessageDeviceIsRequestingClose`](/documentation/USBDriverKit/kUSBHostMessageDeviceIsRequestingClose) [`#define kUSBHostMessageRenegotiateCurrent`](/documentation/USBDriverKit/kUSBHostMessageRenegotiateCurrent) [`#define kUSBHostPortPropertyLinkSpeedLimit`](/documentation/USBDriverKit/kUSBHostPortPropertyLinkSpeedLimit) [`#define kUSBHostPortPropertyStatus`](/documentation/USBDriverKit/kUSBHostPortPropertyStatus) [`#define kUSBHostPortPropertyUSB3Mode`](/documentation/USBDriverKit/kUSBHostPortPropertyUSB3Mode) [`#define kUSBHostPortPropertyUsb3ComplianceMode`](/documentation/USBDriverKit/kUSBHostPortPropertyUsb3ComplianceMode) [`#define kUSBHostPropertyAllowSoftRetry`](/documentation/USBDriverKit/kUSBHostPropertyAllowSoftRetry) [`#define kUSBHostPropertyExclusiveOwner`](/documentation/USBDriverKit/kUSBHostPropertyExclusiveOwner) [`#define kUSBHostPropertyForceHardwareException`](/documentation/USBDriverKit/kUSBHostPropertyForceHardwareException) [`#define kUSBHostReturnNoPower`](/documentation/USBDriverKit/kUSBHostReturnNoPower) [`#define kUSBHostReturnPipeStalled`](/documentation/USBDriverKit/kUSBHostReturnPipeStalled) [`#define kUSBHostReturnRedundant`](/documentation/USBDriverKit/kUSBHostReturnRedundant) [`#define kUSBHostUserClientPropertyBufferAllocations`](/documentation/USBDriverKit/kUSBHostUserClientPropertyBufferAllocations) [`#define kUSBHostUserClientPropertyBufferStatistics`](/documentation/USBDriverKit/kUSBHostUserClientPropertyBufferStatistics) [`#define kUSBHostUserClientPropertyEnableDataToggleReset`](/documentation/USBDriverKit/kUSBHostUserClientPropertyEnableDataToggleReset) [`#define kUSBHostUserClientPropertyEnableReset`](/documentation/USBDriverKit/kUSBHostUserClientPropertyEnableReset) [`#define kUSBHostUserClientPropertyEntitlement`](/documentation/USBDriverKit/kUSBHostUserClientPropertyEntitlement) [`#define kUSBHostUserClientPropertyEntitlementExceptionAllowUnlocked`](/documentation/USBDriverKit/kUSBHostUserClientPropertyEntitlementExceptionAllowUnlocked) [`#define kUSBHostUserClientPropertyEntitlementRequired`](/documentation/USBDriverKit/kUSBHostUserClientPropertyEntitlementRequired) --- Copyright © 2026 Apple Inc. 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