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Latitude E7450 open core Big Sur installation help


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so it boots from usb but not internal drive. then the problem might be it does not see your internal volume. what type of drive is it?

as for the firmware update using cd roms. usualy you use an app that can boot from an iso or converts an iso to a usb bootable device. and boot of of that.

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Hi, it just booted. Gave an error (see hidden content below). Now it's back in the restart loop again...




panic(cpu 3 caller 0xffffff8017460f52): "attempting to register a sysctl at previously registered slot : 141"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.50.7/bsd/kern/kern_newsysctl.c:242

Backtrace (CPU 3), Frame : Return Address

0xffffffb0817eb8a0 : 0xffffff8016ebc66d mach_kernel : _handle_debugger_trap + 0x3dd

0xffffffb0817eb8f0 : 0xffffff8016fff073 mach_kernel : _kdp_i386_trap + 0x143

0xffffffb0817eb930 : 0xffffff8016fef6aa mach_kernel : _kernel_trap + 0x55a

0xffffffb0817eb980 : 0xffffff8016e61a2f mach_kernel : _return_from_trap + 0xff

0xffffffb0817eb9a0 : 0xffffff8016ebbf0d mach_kernel : _DebuggerTrapWithState + 0xad

0xffffffb0817ebac0 : 0xffffff8016ebc1f8 mach_kernel : _panic_trap_to_debugger + 0x268

0xffffffb0817ebb30 : 0xffffff80176bee1a mach_kernel : _panic + 0x54

0xffffffb0817ebba0 : 0xffffff8017460f52 mach_kernel : _sysctl_register_oid + 0x122

0xffffffb0817ebbd0 : 0xffffff80189aaf7c com.apple.driver.AirPort.BrcmNIC : _osl_attach + 0x2f3

0xffffffb0817ebc10 : 0xffffff80189b60aa com.apple.driver.AirPort.BrcmNIC : __ZN15AirPort_BrcmNIC10startGatedEP9IOService + 0x3a

0xffffffb0817ebc80 : 0xffffff80189b605d com.apple.driver.AirPort.BrcmNIC : __ZN15AirPort_BrcmNIC10_doCommandEP8OSObjectPvS2_S2_S2_ + 0x4b

0xffffffb0817ebcb0 : 0xffffff801761988f mach_kernel : __ZN13IOCommandGate9runActionEPFiP8OSObjectPvS2_S2_S2_ES2_S2_S2_S2_ + 0xaf

0xffffffb0817ebd10 : 0xffffff80189b7182 com.apple.driver.AirPort.BrcmNIC : __ZN15AirPort_BrcmNIC5startEP9IOService + 0x3dc

0xffffffb0817ebd80 : 0xffffff801abfe630 as.lvs1974.AirportBrcmFixup : __ZN16AirportBrcmFixupC2Ev + 0xc70

0xffffffb0817ebdd0 : 0xffffff80175ef09b mach_kernel : __ZN9IOService14startCandidateEPS_ + 0xeb

0xffffffb0817ebe40 : 0xffffff80175eec46 mach_kernel : __ZN9IOService15probeCandidatesEP12OSOrderedSet + 0xce6

0xffffffb0817ebef0 : 0xffffff80175eddcf mach_kernel : __ZN9IOService14doServiceMatchEj + 0x30f

0xffffffb0817ebf50 : 0xffffff80175f0b46 mach_kernel : __ZN15_IOConfigThread4mainEPvi + 0x186

0xffffffb0817ebfa0 : 0xffffff8016e6113e mach_kernel : _call_continuation + 0x2e

      Kernel Extensions in backtrace:


            dependency: as.vit9696.Lilu(1.4.9)[8A256245-E916-32EB-95FE-E2BFE5545E33]@0xffffff801aba5000->0xffffff801abccfff

            dependency: com.apple.iokit.IOPCIFamily(2.9)[A18ACD60-A811-3624-B50D-4F929836EE79]@0xffffff8019817000->0xffffff801983efff


            dependency: com.apple.driver.corecapture(1.0.4)[D9E7CF48-1EAF-3D82-8B38-F7BA407BA591]@0xffffff8019fda000->0xffffff8019ff0fff

            dependency: com.apple.driver.mDNSOffloadUserClient(1.0.1b8)[794448A8-2388-3820-B472-24E9D18BB64F]@0xffffff8019811000->0xffffff8019815fff

            dependency: com.apple.iokit.IO80211Family(1200.12.2b1)[EBD11055-A4E6-3243-A60C-0AAAD85C12E3]@0xffffff801883a000->0xffffff8018973fff

            dependency: com.apple.iokit.IONetworkingFamily(3.4)[397FC677-FCF7-39FF-9DB4-1C4533D43559]@0xffffff801958e000->0xffffff80195a4fff

            dependency: com.apple.iokit.IOPCIFamily(2.9)[A18ACD60-A811-3624-B50D-4F929836EE79]@0xffffff8019817000->0xffffff801983efff

            dependency: com.apple.iokit.IOSkywalkFamily(1)[926A0E56-E7CF-3F71-B4CB-5E83EA9E282F]@0xffffff80198e1000->0xffffff801991efff


Process name corresponding to current thread: kernel_task

Boot args: keepsyms=1 debug=0x100 alcid=11


Mac OS version:



Kernel version:

Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64

Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4

KernelCache slide: 0x0000000016c00000

KernelCache base:  0xffffff8016e00000

Kernel slide:      0x0000000016c10000

Kernel text base:  0xffffff8016e10000

__HIB  text base: 0xffffff8016d00000

System model name: MacBookPro12,1 (Mac-E43C1C25D4880AD6)

System shutdown begun: NO

Panic diags file available: YES (0x0)

Hibernation exit count: 0


System uptime in nanoseconds: 8619596615

Last Sleep:           absolute           base_tsc          base_nano

  Uptime  : 0x0000000201c4a2f6

  Sleep   : 0x0000000000000000 0x0000000000000000 0x0000000000000000

  Wake    : 0x0000000000000000 0x0000000cb0b737dc 0x0000000000000000


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