Thanks, I understand.
Update: Still not fixed. Here's what I've done:
Ran Apple hardware diagnostics, showed no error.
Removed & reinstalled Arduino & Teensyduino.
Uninstalled assorted apps with kernel extensions.
Switched USB type to 'Serial + MIDI'
Still crashes about 1 time in 3. Crash report is below, in case it tells anyone anything.
panic(cpu 3 caller 0xffffff80036469aa): Kernel trap at 0xffffff8003aab953, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0x0000000000000018, CR3: 0x000000045b1bc057, CR4: 0x00000000001626e0
RAX: 0x0000000000000000, RBX: 0xffffff80487df300, RCX: 0x0000000000000000, RDX: 0x0000000003000000
RSP: 0xffffff9215c83ca0, RBP: 0xffffff9215c83cb0, RSI: 0xffffff802c8b2800, RDI: 0x0000000000000000
R8: 0x0000000000000000, R9: 0x0000000000000000, R10: 0x0000000000000020, R11: 0xffffff9215c83e80
R12: 0xffffff8024f67ce0, R13: 0xffffff80487df300, R14: 0xffffff802c8b2800, R15: 0xffffff80487df300
RFL: 0x0000000000010207, RIP: 0xffffff8003aab953, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x0000000000000018, Error code: 0x0000000000000000, Fault CPU: 0x3, PL: 0, VF: 0
Backtrace (CPU 3), Frame : Return Address
0xffffff9215c83700 : 0xffffff800351a65d
0xffffff9215c83750 : 0xffffff8003654a75
0xffffff9215c83790 : 0xffffff80036465fe
0xffffff9215c837e0 : 0xffffff80034c0a40
0xffffff9215c83800 : 0xffffff8003519d27
0xffffff9215c83900 : 0xffffff800351a117
0xffffff9215c83950 : 0xffffff8003cc1a6c
0xffffff9215c839c0 : 0xffffff80036469aa
0xffffff9215c83b40 : 0xffffff80036466a8
0xffffff9215c83b90 : 0xffffff80034c0a40
0xffffff9215c83bb0 : 0xffffff8003aab953
0xffffff9215c83cb0 : 0xffffff8003a52321
0xffffff9215c83d10 : 0xffffff8003a53d54
0xffffff9215c83df0 : 0xffffff8003a57cc5
0xffffff9215c83ef0 : 0xffffff8003a578bc
0xffffff9215c83f40 : 0xffffff8003b84be7
0xffffff9215c83fa0 : 0xffffff80034c1206
BSD process name corresponding to current thread: node
Boot args: kext-dev-mode=1
Mac OS version:
19H2
Kernel version:
Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64
Kernel UUID: 05D51A3D-3A87-3FF0-98C3-9CF3827A3EDD
Kernel slide: 0x0000000003200000
Kernel text base: 0xffffff8003400000
__HIB text base: 0xffffff8003300000
System model name: MacBookPro11,1 (Mac-189A3D4F975D5FFC)
System shutdown begun: NO
Panic diags file available: YES (0x0)
System uptime in nanoseconds: 633694260113
last loaded kext at 610998722043: >!UAudio 323.4 (addr 0xffffff7f86f74000, size 434176)
last unloaded kext at 206218522555: >!A!ILpssGspi 3.0.60 (addr 0xffffff7f8677d000, size 45056)
loaded kexts:
@filesystems.smbfs 3.4.4
>AudioAUUC 1.70
@fileutil 20.036.15
@filesystems.autofs 3.0
>X86PlatformShim 1.0.0
>AGPM 111.4.4
>!APlatformEnabler 2.7.0d0
>!AUpstreamUserClient 3.6.8
>!AHDA 283.15
>!AGraphicsDevicePolicy 5.2.6
@AGDCPluginDisplayMetrics 5.2.6
>!A!IHD5000Graphics 14.0.7
>eficheck 1
>!AHV 1
|IOUserEthernet 1.0.1
|IO!BSerialManager 7.0.6f7
>!A!IFramebufferAzul 14.0.7
>!ALPC 3.1
>pmtelemetry 1
@Dont_Steal_Mac_OS_X 7.0.0
>!AThunderboltIP 3.1.4
>!A!ISlowAdaptiveClocking 4.0.0
>!ACameraInterface 7.6.0
>!ABacklight 180.3
>!AMCCSControl 1.14
>!ASMCLMU 212
>!UCardReader 489.120.1
>!UTCKeyboard 255
>!UTCButtons 255
>!AVirtIO 1.0
@filesystems.hfs.kext 522.100.5
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@filesystems.apfs 1412.141.1
>!AAHCIPort 341.140.1
>AirPort.BrcmNIC 1400.1.1
@private.KextAudit 1.0
>!ASmartBatteryManager 161.0.0
>!AACPIButtons 6.1
>!ARTC 2.0
>!AHPET 1.8
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
|EndpointSecurity 1
>!UAudio 323.4
>usb.cdc.ecm 5.0.0
>usb.cdc.acm 5.0.0
>usb.serial 6.0.0
>usb.cdc 5.0.0
@kext.triggers 1.0
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
>!AGraphicsControl 5.2.6
|IOAVB!F 850.1
>X86PlatformPlugin 1.0.0
|IOAccelerator!F2 438.7.3
>IOPlatformPlugin!F 6.0.0d8
@!AGPUWrangler 5.2.6
|IOSlowAdaptiveClocking!F 1.0.0
@!AGraphicsDeviceControl 5.2.6
>!ABacklightExpert 1.1.0
|IONDRVSupport 576.1
>!ASMBus!C 1.0.18d1
>!AHDA!C 283.15
|IOHDA!F 283.15
|IOGraphics!F 576.1
@plugin.IOgPTPPlugin 840.3
|IOEthernetAVB!C 1.1.0
|Broadcom!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CTransport 7.0.6f7
|IO!B!F 7.0.6f7
|IO!BPacketLogger 7.0.6f7
>usb.!UHub 1.2
>!UMultitouch 264
>usb.IOUSBHostHIDDevice 1.2
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
|IOAudio!F 300.2
@vecLib.kext 1.2.0
|IOSerial!F 11
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
|IOAHCIBlock!S 316.100.5
|IOAHCI!F 290.0.1
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AThunderboltPCIDownAdapter 2.5.4
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
|IO80211!F 1200.12.2b1
>mDNSOffloadUserClient 1.0.1b8
>corecapture 1.0.4
|IOSkywalk!F 1
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
>DiskImages 493.0.0
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
|IOUSBMass!SDriver 157.140.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
|CoreAnalytics!F 1
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1