I've been trying to create a Provisioning Profile through the developer "Certificates, Identifiers & Profiles" webpage. The Profile will provide our DriverKit development entitlements. I am able to select the Type, the App ID, Certificates and Entitlements without problems. However, when I go to click the final "Generate" button it spins for a couple of seconds and then stops. No error message is presented, and it never proceeds to the "Download" step. Any ideas what could cause this and how to resolve it?

I'm trying to prepare a buffer for DMA, but PrepareForDMA always fails with error 0xe00002c2 - kIOReturnBadArgument. I've watched the WWDC20 session, but I'm not sure what I'm doing wrong - any help much appreciated! constexpr auto bufferSize = 1024u; struct DMABufferInfo {     IOBufferMemoryDescriptor* descriptor;     IODMACommand* command;     uint32_t segmentsCount;     IOAddressSegment segments[32];     uint64_t flags; }; struct Driver_IVars {     IOPCIDevice* device;     DMABufferInfo bufferInfo; } ... kern_return_t IMPL(Driver, Start) { 		/* 		 * Successfully opens device 		 * Writes to PCIDevice command register 		 */ 		... 		os_log(OS_LOG_DEFAULT, "Allocating buffer...");     ret = IOBufferMemoryDescriptor::Create(    		 kIOMemoryDirectionOut,    		 bufferSize,         0,         &ivars->bufferInfo.descriptor     );     \__Require(ret == kIOReturnSuccess, Exit); 		ret = ivars->bufferInfo.descriptor->SetLength(bufferSize); 		\__Require(ret == kIOReturnSuccess, Exit); 		os_log(OS_LOG_DEFAULT, "Creating IODMACommand..."); 		IODMACommandSpecification dmaSpecification; 		bzero(&dmaSpecification, sizeof(dmaSpecification)); 		dmaSpecification.options = kIODMACommandSpecificationNoOptions; 		dmaSpecification.maxAddressBits = 64;     IODMACommand::Create( 				ivars->device, 				kIODMACommandCreateNoOptions, 				&dmaSpecification, 				&ivars->bufferInfo.command 		);     \__Require(ret == kIOReturnSuccess, Exit);     os_log(OS_LOG_DEFAULT, "Preparing For DMA...");     ret = ivars->bufferInfo.command->PrepareForDMA( 				kIODMACommandPrepareForDMANoOptions, 				ivars->bufferInfo.descriptor, 				0, 				0, 				&ivars->bufferInfo.flags, 				&ivars->bufferInfo.segmentsCount, 				ivars->bufferInfo.segments 		); 		\__Require(ret == kIOReturnSuccess, Exit); 		os_log(OS_LOG_DEFAULT, "Prepared buffer for DMA"); Exit: 		os_log(OS_LOG_DEFAULT, "Exiting: %s, ret = %#010x",\__FUNCTION\__, ret); 		return ret; } Log output: Allocating playback buffer... Creating IODMACommand... Preparing For DMA... Exiting: Start_Impl, ret = 0xe00002c2