*** Panic Report *** panic(cpu 1 caller 0xffffff800700290a): "zfree: invalid head pointer 0xffffff814854efff for freelist of zone kalloc.256\n"@/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-4903.271.2/osfmk/kern/zalloc.c:1294 Backtrace (CPU 1), Frame : Return Address 0xffffff9af4acb5d0 : 0xffffff8006fae6ed 0xffffff9af4acb620 : 0xffffff80070ea185 0xffffff9af4acb660 : 0xffffff80070db8ba 0xffffff9af4acb6d0 : 0xffffff8006f5bb40 0xffffff9af4acb6f0 : 0xffffff8006fae107 0xffffff9af4acb810 : 0xffffff8006fadf53 0xffffff9af4acb880 : 0xffffff800700290a 0xffffff9af4acb8c0 : 0xffffff8007004bda 0xffffff9af4acb9a0 : 0xffffff800765feec 0xffffff9af4acb9d0 : 0xffffff800766007f 0xffffff9af4acba50 : 0xffffff7f8907e5b2 0xffffff9af4acba70 : 0xffffff7f8907c85e 0xffffff9af4acba90 : 0xffffff7f8907c7aa 0xffffff9af4acbab0 : 0xffffff7f89085368 0xffffff9af4acbae0 : 0xffffff80076863e8 0xffffff9af4acbb30 : 0xffffff800768f892 0xffffff9af4acbc70 : 0xffffff80070965c6 0xffffff9af4acbd80 : 0xffffff8006fb3f2c 0xffffff9af4acbdd0 : 0xffffff8006f8eca1 0xffffff9af4acbe50 : 0xffffff8006fa33be 0xffffff9af4acbef0 : 0xffffff80070c17e7 0xffffff9af4acbfa0 : 0xffffff8006f5c326 Kernel Extensions in backtrace: com.apple.iokit.IOSurface(255.6.1)[263BDC28-38C8-3995-BB6B-AD419E41C2DC]@0xffffff7f89079000->0xffffff7f8909afff BSD process name corresponding to current thread: FontBase Helper Mac OS version: 18G95 Kernel version: Darwin Kernel Version 18.7.0: Tue Aug 20 16:57:14 PDT 2019; root:xnu-4903.271.2~2/RELEASE_X86_64 Kernel UUID: C41337A1-0EC3-3896-A954-A1F85E849D53 Kernel slide: 0x0000000006c00000 Kernel text base: 0xffffff8006e00000 __HIB text base: 0xffffff8006d00000 System model name: iMac17,1 (Mac-DB15BD556843C820) System uptime in nanoseconds: 1879250052546 last loaded kext at 258667114605: com.apple.filesystems.msdosfs 1.10 (addr 0xffffff7f8b7bd000, size 69632) last unloaded kext at 776743809779: com.apple.filesystems.msdosfs 1.10 (addr 0xffffff7f8b7bd000, size 61440) loaded kexts: com.apple.filesystems.smbfs 3.3.2 com.apple.driver.AudioAUUC 1.70 com.apple.fileutil 20.036.15 com.apple.filesystems.autofs 3.0 com.apple.driver.AppleMikeyHIDDriver 131 com.apple.driver.AppleHDA 282.54 com.apple.driver.AppleMikeyDriver 282.54 com.apple.driver.ApplePlatformEnabler 2.7.0d0 com.apple.driver.AGPM 110.25.11 com.apple.driver.X86PlatformShim 1.0.0 com.apple.driver.AppleUpstreamUserClient 3.6.5 com.apple.kext.AMDFramebuffer 2.1.1 com.apple.kext.AMDRadeonX4000 2.1.1 com.apple.driver.AppleGraphicsDevicePolicy 3.50.12 com.apple.AGDCPluginDisplayMetrics 3.50.12 com.apple.driver.AppleHV 1 com.apple.iokit.IOUserEthernet 1.0.1 com.apple.iokit.IOBluetoothSerialManager 6.0.14d3 com.apple.driver.pmtelemetry 1 com.apple.driver.AppleIntelSKLGraphics 12.1.0 com.apple.Dont_Steal_Mac_OS_X 7.0.0 com.apple.driver.AppleIntelPCHPMC 2.0.1 com.apple.driver.AppleMCCSControl 1.5.9 com.apple.driver.eficheck 1 com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0 com.apple.iokit.BroadcomBluetooth20703USBTransport 6.0.14d3 com.apple.driver.AppleOSXWatchdog 1 com.apple.driver.AppleSMCLMU 212 com.apple.driver.AppleIntelSKLGraphicsFramebuffer 12.1.0 com.apple.kext.AMD7000Controller 2.1.1 com.apple.driver.AppleThunderboltIP 3.1.2 com.apple.driver.AppleTopCaseHIDEventDriver 138.4 com.apple.driver.AppleUSBTopCaseDriver 138.4 com.apple.driver.AppleVirtIO 2.1.3 com.apple.filesystems.hfs.kext 407.200.4 com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1 com.apple.BootCache 40 com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0 com.apple.AppleSystemPolicy 1.0 com.apple.driver.AppleSDXC 1.7.6 com.apple.driver.AirPort.BrcmNIC 1400.1.1 com.apple.iokit.AppleBCM5701Ethernet 10.3.3 com.apple.filesystems.apfs 945.275.7 com.apple.driver.AppleAHCIPort 329.260.5 com.apple.private.KextAudit 1.0 com.apple.driver.AppleRTC 2.0 com.apple.driver.AppleACPIButtons 6.1 com.apple.driver.AppleHPET 1.8 com.apple.driver.AppleSMBIOS 2.1 com.apple.driver.AppleACPIEC 6.1 com.apple.driver.AppleAPIC 1.7 com.apple.nke.applicationfirewall 201 com.apple.security.TMSafetyNet 8 com.apple.kext.triggers 1.0 com.apple.driver.DspFuncLib 282.54 com.apple.kext.OSvKernDSPLib 528 com.apple.kext.AMDRadeonX4030HWLibs 1.0 com.apple.kext.AMDRadeonX4000HWServices 2.1.1 com.apple.driver.AppleGraphicsControl 3.50.12 com.apple.iokit.IOAVBFamily 760.6 com.apple.plugin.IOgPTPPlugin 740.2 com.apple.iokit.IOSkywalkFamily 1 com.apple.driver.AppleSSE 1.0 com.apple.AppleGPUWrangler 3.50.12 com.apple.driver.AppleSMBusController 1.0.18d1 com.apple.driver.AppleHDAController 282.54 com.apple.iokit.IOHDAFamily 282.54 com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0 com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 6.0.14d3 com.apple.iokit.IOBluetoothHostControllerUSBTransport 6.0.14d3 com.apple.iokit.IOBluetoothHostControllerTransport 6.0.14d3 com.apple.driver.AppleSMBusPCI 1.0.14d1 com.apple.driver.X86PlatformPlugin 1.0.0 com.apple.driver.IOPlatformPluginFamily 6.0.0d8 com.apple.iokit.IOAcceleratorFamily2 404.14 com.apple.iokit.IOSurface 255.6.1 com.apple.iokit.IONDRVSupport 530.51 com.apple.kext.AMDSupport 2.1.1 com.apple.AppleGraphicsDeviceControl 3.50.12 com.apple.iokit.IOGraphicsFamily 530.66 com.apple.driver.AppleThunderboltEDMSink 4.2.0 com.apple.driver.AppleHSBluetoothDriver 138.4 com.apple.driver.IOBluetoothHIDDriver 6.0.14d3 com.apple.iokit.IOBluetoothFamily 6.0.14d3 com.apple.driver.AppleHIDKeyboard 208 com.apple.driver.AppleMultitouchDriver 2450.1 com.apple.driver.AppleInputDeviceSupport 2440.2 com.apple.driver.usb.AppleUSBHub 1.2 com.apple.driver.usb.IOUSBHostHIDDevice 1.2 com.apple.iokit.IOAudioFamily 206.5 com.apple.vecLib.kext 1.2.0 com.apple.driver.usb.networking 5.0.0 com.apple.driver.usb.AppleUSBHostCompositeDevice 1.2 com.apple.iokit.IOSerialFamily 11 com.apple.filesystems.hfs.encodings.kext 1 com.apple.driver.AppleThunderboltDPInAdapter 5.6.9 com.apple.driver.AppleThunderboltDPOutAdapter 5.6.9 com.apple.driver.AppleThunderboltDPAdapterFamily 5.6.9 com.apple.driver.AppleThunderboltPCIDownAdapter 2.1.5 com.apple.driver.AppleThunderboltNHI 4.7.9 com.apple.iokit.IOThunderboltFamily 6.8.6 com.apple.iokit.IO80211Family 1200.12.2 com.apple.driver.corecapture 1.0.4 com.apple.iokit.IOEthernetAVBController 1.1.0 com.apple.driver.mDNSOffloadUserClient 1.0.1b8 com.apple.iokit.IONVMeFamily 2.1.0 com.apple.iokit.IOAHCIBlockStorage 301.270.1 com.apple.driver.AppleUSBMergeNub 900.4.2 com.apple.driver.AppleUSBHostMergeProperties 1.2 com.apple.driver.usb.AppleUSBHostPacketFilter 1.0 com.apple.iokit.IOUSBFamily 900.4.2 com.apple.driver.usb.AppleUSBXHCIPCI 1.2 com.apple.driver.usb.AppleUSBXHCI 1.2 com.apple.iokit.IOAHCIFamily 288 com.apple.driver.AppleEFINVRAM 2.1 com.apple.driver.AppleEFIRuntime 2.1 com.apple.iokit.IOSMBusFamily 1.1 com.apple.iokit.IOHIDFamily 2.0.0 com.apple.security.quarantine 3 com.apple.security.sandbox 300.0 com.apple.kext.AppleMatch 1.0.0d1 com.apple.driver.DiskImages 493.0.0 com.apple.driver.AppleFDEKeyStore 28.30 com.apple.driver.AppleEffaceableStorage 1.0 com.apple.driver.AppleKeyStore 2 com.apple.driver.AppleUSBTDM 456.260.3 com.apple.driver.AppleMobileFileIntegrity 1.0.5 com.apple.iokit.IOUSBMassStorageDriver 145.200.2 com.apple.iokit.IOSCSIBlockCommandsDevice 408.250.3 com.apple.iokit.IOSCSIArchitectureModelFamily 408.250.3 com.apple.iokit.IOStorageFamily 2.1 com.apple.kext.CoreTrust 1 com.apple.driver.AppleCredentialManager 1.0 com.apple.driver.KernelRelayHost 1 com.apple.iokit.IOUSBHostFamily 1.2 com.apple.driver.usb.AppleUSBCommon 1.0 com.apple.driver.AppleBusPowerController 1.0 com.apple.driver.AppleSEPManager 1.0.1 com.apple.driver.IOSlaveProcessor 1 com.apple.iokit.IOReportFamily 47 com.apple.iokit.IOTimeSyncFamily 740.2 com.apple.iokit.IONetworkingFamily 3.4 com.apple.driver.AppleACPIPlatform 6.1 com.apple.driver.AppleSMC 3.1.9 com.apple.iokit.IOPCIFamily 2.9 com.apple.iokit.IOACPIFamily 1.4 com.apple.kec.pthread 1 com.apple.kec.Libm 1 com.apple.kec.corecrypto 1.0 EOF Model: iMac17,1, BootROM 170.0.0.0.0, 4 processors, Intel Core i5, 3.2 GHz, 24 GB, SMC 2.33f10 Graphics: kHW_AMDRadeonR9M390Item, AMD Radeon R9 M390, spdisplays_pcie_device, 2 GB Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1867 MHz, 0x00, - Memory Module: BANK 0/DIMM1, 8 GB, DDR3, 1867 MHz, 0x00, - Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1867 MHz, 0x802C, 0x384B54463531323634485A2D314739503220 Memory Module: BANK 1/DIMM1, 4 GB, DDR3, 1867 MHz, 0x802C, 0x384B54463531323634485A2D314739503220 AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x14A), Broadcom BCM43xx 1.0 (7.77.61.2 AirPortDriverBrcmNIC-1305.8) Bluetooth: Version 6.0.14d3, 3 services, 27 devices, 1 incoming serial ports Network Service: Ethernet, Ethernet, en0 Serial ATA Device: APPLE HDD ST1000DM003, 1 TB USB Device: USB 3.0 Bus USB Device: Keyboard Hub USB Device: Apple Keyboard USB Device: Bluetooth USB Host Controller USB Device: FaceTime HD Camera (Built-in) USB Device: Magic Mouse 2 USB Device: USB Laser Mouse Thunderbolt Bus: iMac, Apple Inc., 28.1