This happens whenever I run FreeFileSync to copy about 90GB from MacBook Air to Synology NAS, as backup. ---------------------------------------------------------------- Problem Details and System Configuration ________________________________________________________________ panic(cpu 4 caller 0xfffffe002ae45df8): watchdog timeout: no checkins from watchdogd in 90 seconds (3188 total checkins since monitoring last enabled) Debugger message: panic Memory ID: 0xff OS release type: User OS version: 20G165 Kernel version: Darwin Kernel Version 20.6.0: Mon Aug 30 06:12:20 PDT 2021; root:xnu-7195.141.6~3/RELEASE_ARM64_T8101 Fileset Kernelcache UUID: 6304A06696A657F4CF48CC569B129642 Kernel UUID: DA16DC13-5845-3638-9BB4-B14F9AC08E55 iBoot version: iBoot-6723.140.2 secure boot?: YES Paniclog version: 13 KernelCache slide: 0x0000000020394000 KernelCache base: 0xfffffe0027398000 Kernel slide: 0x0000000020edc000 Kernel text base: 0xfffffe0027ee0000 Kernel text exec base: 0xfffffe0027fac000 mach_absolute_time: 0x101e95848ea1 Epoch Time: sec usec Boot : 0x6157b19f 0x0008d9b0 Sleep : 0x616c7cef 0x00099e0e Wake : 0x616c7cf0 0x0007c68c Calendar: 0x616cf9cb 0x00051a4e CORE 0 recently retired instr at 0xfffffe002811ed50 CORE 1 recently retired instr at 0xfffffe002811ed50 CORE 2 recently retired instr at 0xfffffe002811ed50 CORE 3 recently retired instr at 0xfffffe002811ed50 CORE 4 recently retired instr at 0xfffffe002811d688 CORE 5 recently retired instr at 0xfffffe002811ed54 CORE 6 recently retired instr at 0xfffffe002811ed54 CORE 7 recently retired instr at 0xfffffe002811ed54 CORE 0 PVH locks held: None CORE 1 PVH locks held: None CORE 2 PVH locks held: None CORE 3 PVH locks held: None CORE 4 PVH locks held: None CORE 5 PVH locks held: None CORE 6 PVH locks held: None CORE 7 PVH locks held: None CORE 0: PC=0xfffffe0028025a48, LR=0xfffffe0028025a40, FP=0xfffffe3f4434bee0 CORE 1: PC=0xfffffe0028025a48, LR=0xfffffe0028025a40, FP=0xfffffe3f4400bee0 CORE 2: PC=0xfffffe0028025a48, LR=0xfffffe0028025a40, FP=0xfffffe3f44ca3ee0 CORE 3: PC=0xfffffe0028025a48, LR=0xfffffe0028025a40, FP=0xfffffe30976a3ee0 CORE 4 is the one that panicked. Check the full backtrace for details. CORE 5: PC=0xfffffe00280bcbe0, LR=0xfffffe00280bc648, FP=0xfffffe3f44713ed0 CORE 6: PC=0xfffffe0028025a48, LR=0xfffffe0028025a40, FP=0xfffffe309876bee0 CORE 7: PC=0xfffffe0028025a48, LR=0xfffffe0028025a40, FP=0xfffffe3f4457bee0 Total cpu_usage: 143006793 Thread task pri cpu_usage 0xfffffe002bdd5c68 kernel_task 91 5254077 0xfffffe1666eda640 kernel_task 91 1774546 0xfffffe1666e08000 kernel_task 0 0 0xfffffe1666e07300 kernel_task 0 1257875 0xfffffe1666f60660 kernel_task 0 4912160 Panicked task 0xfffffe1666a8c688: 161741 pages, 476 threads: pid 0: kernel_task Panicked thread: 0xfffffe1666eda640, backtrace: 0xfffffe304d63f8b0, tid: 1502 lr: 0xfffffe0027ffab44 fp: 0xfffffe304d63f920 lr: 0xfffffe0027ffa928 fp: 0xfffffe304d63f990 lr: 0xfffffe00281241ac fp: 0xfffffe304d63f9b0 lr: 0xfffffe0028115658 fp: 0xfffffe304d63fa60 lr: 0xfffffe0027fb37e8 fp: 0xfffffe304d63fa70 lr: 0xfffffe0027ffa5b8 fp: 0xfffffe304d63fe00 lr: 0xfffffe0027ffa5b8 fp: 0xfffffe304d63fe70 lr: 0xfffffe00287aceb8 fp: 0xfffffe304d63fe90 lr: 0xfffffe002ae45df8 fp: 0xfffffe304d63fec0 lr: 0xfffffe002ae455bc fp: 0xfffffe304d63ff00 lr: 0xfffffe0029399668 fp: 0xfffffe304d63ff20 lr: 0xfffffe00291128c8 fp: 0xfffffe304d63ffb0 lr: 0xfffffe00287012fc fp: 0xfffffe304d63ffc0 lr: 0xfffffe002811812c fp: 0xfffffe304d63ffe0 lr: 0xfffffe0027fb385c fp: 0xfffffe304d63fff0 lr: 0xfffffe00281142ec fp: 0xfffffe3f4441be90 lr: 0xfffffe00280c00c8 fp: 0xfffffe3f4441bf00 lr: 0xfffffe0027fbcc38 fp: 0x0000000000000000 Kernel Extensions in backtrace: com.apple.driver.AppleInterruptController(1.0d1)[ADA8AD57-0935-353F-9E3A-3D447DE1C729]@0xfffffe0029110000->0xfffffe0029113fff dependency: com.apple.driver.AppleARMPlatform(1.0.2)[A2AC41B1-D345-38ED-8143-F0219A85BD29]@0xfffffe0028908000->0xfffffe0028957fff com.apple.driver.watchdog(1.0)[77AFCDA0-7D74-3AD4-8BE0-F1A01B11C470]@0xfffffe002ae44000->0xfffffe002ae47fff com.apple.driver.AppleS5L8960XWatchDogTimer(1.0)[EF31323B-8B11-38AE-99DE-3798FD8D6549]@0xfffffe0029398000->0xfffffe002939bfff dependency: com.apple.driver.AppleARMPlatform(1.0.2)[A2AC41B1-D345-38ED-8143-F0219A85BD29]@0xfffffe0028908000->0xfffffe0028957fff dependency: com.apple.driver.watchdog(1)[77AFCDA0-7D74-3AD4-8BE0-F1A01B11C470]@0xfffffe002ae44000->0xfffffe002ae47fff dependency: com.apple.iokit.IOReportFamily(47)[E8EF9F58-10E1-3350-9129-3D68D345F7F4]@0xfffffe002a418000->0xfffffe002a41bfff last started kext at 17310596702807: com.apple.filesystems.ntfs 3.14.3 (addr 0xfffffe0027e98000, size 98304) last stopped kext at 17625306516447: com.apple.filesystems.exfat 1.4 (addr 0xfffffe0027e84000, size 16384) loaded kexts: com.apple.driver.usb.realtek8153patcher 5.0.0 com.apple.iokit.SCSITaskUserClient 436.140.1 com.apple.driver.usb.AppleUSBHostBillboardDevice 1.0 com.apple.filesystems.smbfs 3.6.1 com.apple.filesystems.afpfs 11.3 com.apple.nke.asp_tcp 8.2 com.apple.fileutil 20.036.15 com.apple.filesystems.autofs 3.0 com.apple.driver.AppleTopCaseHIDEventDriver 4050.1 com.apple.iokit.IOBluetoothSerialManager 8.0.5d7 com.apple.driver.AppleBiometricServices 1 com.apple.driver.BCMWLANFirmware4378.Hashstore 1 com.apple.driver.CoreKDL 1 com.apple.driver.SEPHibernation 1 com.apple.driver.DiskImages.ReadWriteDiskImage 493.0.0 com.apple.driver.DiskImages.UDIFDiskImage 493.0.0 com.apple.driver.DiskImages.RAMBackingStore 493.0.0 com.apple.driver.DiskImages.FileBackingStore 493.0.0 com.apple.driver.AppleUSBDeviceNCM 5.0.0 com.apple.driver.AppleSmartBatteryManager 161.0.0 com.apple.driver.AppleThunderboltIP 4.0.3 com.apple.filesystems.apfs 1677.141.2 com.apple.driver.AppleALSColorSensor 1.0.0d1 com.apple.driver.AppleFileSystemDriver 3.0.1 com.apple.nke.l2tp 1.9 com.apple.filesystems.tmpfs 1 com.apple.driver.AppleAOPVoiceTrigger 11.5 com.apple.IOTextEncryptionFamily 1.0.0 com.apple.filesystems.hfs.kext 556.100.11 com.apple.security.BootPolicy 1 com.apple.BootCache 40 com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0 com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1 com.apple.driver.ApplePMP 1 com.apple.driver.ApplePMPFirmware 1 com.apple.driver.AppleSmartIO2 1 com.apple.AppleEmbeddedSimpleSPINORFlasher 1 com.apple.driver.AppleCS42L83Audio 442.26 com.apple.driver.AppleSPMIPMU 1.0.1 com.apple.driver.AppleDPDisplayTCON 1 com.apple.driver.AppleTAS5770LAmp 442.26 com.apple.driver.AppleMobileDispH13G-DCP 140.0 com.apple.driver.AppleJPEGDriver 4.6.0 com.apple.driver.AppleAVE2 401.73.4 com.apple.driver.AppleAVD 385 com.apple.AGXG13G 173.28.7 com.apple.driver.AudioDMAController-T8103 1.60.5 com.apple.driver.usb.AppleUSBHostT8103 1 com.apple.driver.AppleT8020SOCTuner 1 com.apple.driver.AppleT8103CLPCv3 1 com.apple.driver.AppleS5L8960XNCO 1 com.apple.driver.AppleT8103PMGR 1 com.apple.driver.AppleS8000AES 1 com.apple.driver.AppleS8000DWI 1.0.0d1 com.apple.driver.AppleS5L8960XWatchDogTimer 1 com.apple.driver.AppleInterruptController 1.0.0d1 com.apple.driver.AppleT8020DART 1 com.apple.driver.AppleBluetoothModule 1 com.apple.driver.AppleSamsungSerial 1.0.0d1 com.apple.driver.AppleBCMWLANBusInterfacePCIe 1 com.apple.driver.AppleS5L8920XPWM 1.0.0d1 com.apple.driver.AppleS5L8940XI2C 1.0.0d2 com.apple.driver.AppleSPIMC 1 com.apple.driver.AppleT8101 1 com.apple.driver.AppleM68Buttons 1.0.0d1 com.apple.iokit.IOUserEthernet 1.0.1 com.apple.driver.usb.AppleUSBUserHCI 1 com.apple.iokit.IOKitRegistryCompatibility 1 com.apple.iokit.EndpointSecurity 1 com.apple.driver.AppleDiskImages2 1 com.apple.AppleSystemPolicy 2.0.0 com.apple.nke.applicationfirewall 311 com.apple.kec.InvalidateHmac 1 com.apple.security.SecureRemotePassword 1.0 com.apple.kext.triggers 1.0 com.apple.driver.usb.cdc.ecm 5.0.0 com.apple.driver.usb.cdc.ncm 5.0.0 com.apple.driver.usb.cdc.acm 5.0.0 com.apple.driver.usb.serial 6.0.0 com.apple.driver.AppleHIDKeyboard 224 com.apple.driver.AppleActuatorDriver 4440.3 com.apple.driver.AppleMultitouchDriver 4440.3 com.apple.driver.AppleHSBluetoothDriver 4050.1 com.apple.driver.IOBluetoothHIDDriver 8.0.5d7 com.apple.iokit.IOAVBFamily 940.4 com.apple.plugin.IOgPTPPlugin 985.2 com.apple.iokit.IOEthernetAVBController 1.1.0 com.apple.driver.AppleMesaSEPDriver 100.99 com.apple.iokit.IOBiometricFamily 1 com.apple.driver.usb.cdc 5.0.0 com.apple.driver.AppleUSBAudio 405.39 com.apple.iokit.IOAudioFamily 300.6.1 com.apple.vecLib.kext 1.2.0 com.apple.driver.AppleSEPHDCPManager 1.0.1 com.apple.driver.AppleTrustedAccessory 1 com.apple.iokit.AppleSEPGenericTransfer 1 com.apple.driver.DiskImages.KernelBacked 493.0.0 com.apple.driver.AppleBTM 1.0.1 com.apple.driver.IOBluetoothHostControllerPCIeTransport 8.0.5d7 com.apple.iokit.IOBluetoothHostControllerTransport 8.0.5d7 com.apple.driver.usb.networking 5.0.0 com.apple.driver.AppleConvergedIPCOLYBTControl 1 com.apple.driver.AppleConvergedPCI 1 com.apple.driver.AppleBluetoothDebug 1 com.apple.driver.AppleThunderboltDPInAdapter 8.1.4 com.apple.driver.AppleThunderboltDPAdapterFamily 8.1.4 com.apple.driver.AppleThunderboltUSBDownAdapter 1.0.4 com.apple.driver.AppleThunderboltPCIDownAdapter 4.1.1 com.apple.driver.AppleXsanScheme 3 com.apple.nke.ppp 1.9 com.apple.driver.AppleAOPAudio 16.2 com.apple.driver.AppleDCPDPTXProxy 1.0.0 com.apple.driver.DCPDPFamilyProxy 1 com.apple.driver.AppleHIDTransportSPI 4400.35 com.apple.driver.AppleHIDTransport 4400.35 com.apple.driver.AppleInputDeviceSupport 4400.35 com.apple.driver.AppleBSDKextStarter 3 com.apple.filesystems.hfs.encodings.kext 1 com.apple.iokit.IONVMeFamily 2.1.0 com.apple.driver.AppleDiagnosticDataAccessReadOnly 1.0.0 com.apple.driver.AppleNANDConfigAccess 1.0.0 com.apple.AGXFirmwareKextG13GRTBuddy 173.28.7 com.apple.AGXFirmwareKextRTBuddy64 173.28.7 com.apple.driver.AppleStockholmControl 1.0.0 com.apple.driver.AppleSPU 1 com.apple.driver.AppleHPM 3.4.4 com.apple.driver.AppleCSEmbeddedAudio 442.26 com.apple.driver.AppleDialogPMU 1.0.1 com.apple.driver.AppleEmbeddedAudio 442.26 com.apple.iokit.AppleARMIISAudio 80.34.1 com.apple.iokit.IOMobileGraphicsFamily-DCP 343.0.0 com.apple.iokit.IOMobileGraphicsFamily 343.0.0 com.apple.driver.AppleDCP 1 com.apple.driver.DCPAVFamilyProxy 1 com.apple.driver.AppleFirmwareKit 1 com.apple.driver.AppleH13CameraInterface 3.58.0 com.apple.driver.AppleH10PearlCameraInterface 16.15.1 com.apple.driver.AppleH11ANEInterface 4.76.0 com.apple.iokit.IOGPUFamily 21.11 com.apple.driver.AppleSART 1 com.apple.driver.AppleUSBXDCIARM 1.0 com.apple.driver.AppleUSBXDCI 1.0 com.apple.iokit.IOUSBDeviceFamily 2.0.0 com.apple.driver.usb.AppleUSBXHCIARM 1 com.apple.driver.usb.AppleUSBXHCI 1.2 com.apple.driver.AppleEmbeddedUSBHost 1 com.apple.driver.usb.AppleUSBHub 1.2 com.apple.driver.usb.AppleUSBHostCompositeDevice 1.2 com.apple.driver.ApplePassthroughPPM 3.0 com.apple.driver.AppleT8103TypeCPhy 1 com.apple.driver.AppleSPMI 1.0.1 com.apple.driver.ApplePMGR 1 com.apple.driver.watchdog 1 com.apple.driver.usb.AppleUSBHostPacketFilter 1.0 com.apple.driver.AppleDisplayCrossbar 1.0.0 com.apple.iokit.IODisplayPortFamily 1.0.0 com.apple.driver.AppleTypeCPhy 1 com.apple.driver.AppleThunderboltNHI 7.2.8 com.apple.driver.AppleT8103PCIeC 1 com.apple.iokit.IOThunderboltFamily 9.3.2 com.apple.driver.ApplePIODMA 1 com.apple.driver.AppleT8103PCIe 1 com.apple.driver.AppleMultiFunctionManager 1 com.apple.driver.AppleEmbeddedPCIE 1 com.apple.driver.AppleBluetoothDebugService 1 com.apple.driver.AppleBCMWLANCore 1.0.0 com.apple.iokit.IO80211FamilyV2 1200.12.2b1 com.apple.driver.IOImageLoader 1.0.0 com.apple.driver.corecapture 1.0.4 com.apple.driver.AppleMCA2-T8103 540.10 com.apple.driver.AppleGPIOICController 1.0.2 com.apple.driver.AppleFireStormErrorHandler 1 com.apple.driver.AppleMobileApNonce 1 com.apple.iokit.IOTimeSyncFamily 985.2 com.apple.driver.DiskImages 493.0.0 com.apple.iokit.IOGraphicsFamily 585.1 com.apple.iokit.IOBluetoothFamily 8.0.5d7 com.apple.iokit.IOBluetoothPacketLogger 8.0.5d7 com.apple.driver.FairPlayIOKit 68.7.1 com.apple.iokit.CoreAnalyticsFamily 1 com.apple.driver.AppleSSE 1.0 com.apple.driver.AppleSEPKeyStore 2 com.apple.driver.AppleUSBTDM 511.141.1 com.apple.iokit.IOUSBMassStorageDriver 184.140.2 com.apple.iokit.IOPCIFamily 2.9 com.apple.iokit.IOSCSIBlockCommandsDevice 436.140.1 com.apple.iokit.IOSCSIArchitectureModelFamily 436.140.1 com.apple.driver.AppleIPAppender 1.0 com.apple.driver.AppleFDEKeyStore 28.30 com.apple.driver.AppleEffaceableStorage 1.0 com.apple.driver.AppleCredentialManager 1.0 com.apple.driver.KernelRelayHost 1 com.apple.iokit.IOUSBHostFamily 1.2 com.apple.driver.AppleUSBHostMergeProperties 1.2 com.apple.driver.usb.AppleUSBCommon 1.0 com.apple.driver.AppleSMC 3.1.9 com.apple.driver.RTBuddy 1.0.0 com.apple.driver.AppleEmbeddedTempSensor 1.0.0 com.apple.driver.AppleARMPMU 1.0 com.apple.iokit.IOAccessoryManager 1.0.0 com.apple.driver.AppleOnboardSerial 1.0 com.apple.iokit.IOSkywalkFamily 1 com.apple.driver.mDNSOffloadUserClient 1.0.1b8 com.apple.iokit.IONetworkingFamily 3.4 com.apple.iokit.IOSerialFamily 11 com.apple.driver.AppleSEPManager 1.0.1 com.apple.driver.AppleA7IOP 1.0.2 com.apple.driver.IOSlaveProcessor 1 com.apple.driver.AppleBiometricSensor 2 com.apple.iokit.IOHIDFamily 2.0.0 com.apple.AUC 1.0 com.apple.iokit.IOAVFamily 1.0.0 com.apple.iokit.IOHDCPFamily 1.0.0 com.apple.iokit.IOCECFamily 1 com.apple.iokit.IOAudio2Family 1.0 com.apple.driver.AppleEmbeddedAudioLibs 1.17 com.apple.driver.AppleFirmwareUpdateKext 1 com.apple.driver.AppleM2ScalerCSCDriver 265.0.0 com.apple.iokit.IOSurface 290.8.1 com.apple.driver.IODARTFamily 1 com.apple.security.quarantine 4 com.apple.security.sandbox 300.0 com.apple.kext.AppleMatch 1.0.0d1 com.apple.driver.AppleMobileFileIntegrity 1.0.5 com.apple.kext.CoreTrust 1 com.apple.security.AppleImage4 3.0.0 com.apple.iokit.IOCryptoAcceleratorFamily 1.0.1 com.apple.driver.AppleARMPlatform 1.0.2 com.apple.iokit.IOStorageFamily 2.1 com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0 com.apple.iokit.IOReportFamily 47 com.apple.kec.pthread 1 com.apple.kec.corecrypto 11.1 com.apple.kec.Libm 1 ** Stackshot Succeeded ** Bytes Traced 267923 (Uncompressed 649664) **