Razer Blade Stealth 8550U, BIOS 3.02 breaks Clover and OpenCore installations.

[danausx]

I was having lots of issues getting Hackintosh to work because of latest BIOS 3.02 update on Blade Stealth 8550U.

Downgraded Bios and it's boot block to 2.0.1 and works perfectly fine now!

Will write a small guide on how I achieved the Bios downgrade!

This is part of the non-working log:

01:593 00:031 AAPL: #[EB|LOG:VERBOSE] 2020-10-23T19:16:29 01:623 00:029 AAPL: #[EB|OPT:BM] 0x200002 01:654 00:031 AAPL: #[EB.OPT.LXF|F] <"\System\Library\CoreServices\PlatformSupport.plist"> 01:684 00:030 AAPL: #[EB.LD.LF|IN] 0 1 <"\System\Library\CoreServices\PlatformSupport.plist"> <"0"> 01:716 00:031 AAPL: #[EB|B:VAw] 01:747 00:031 AAPL: #[EB|P:CPR] N 01:777 00:030 AAPL: #[EB|P:MPI] N 01:807 00:030 AAPL: #[EB|P:BPI] N 01:838 00:030 AAPL: #[EB|KMR] 496455680 01:868 00:029 AAPL: #[EB.CS.CSKSD|+] 01:898 00:030 AAPL: #[EB.CS.CSKSD|!] Err(0xE) <- RT.GV boot-info-payload 8D63D4FE-BD3C-4AAD-881D-86FD974BC1DF 01:928 00:030 AAPL: #[EB.G.CS|-?] Ok(0) 01:960 00:031 AAPL: #[EB.LD.LF|IN] 0 1 <""> <"1"> 01:997 00:036 AAPL: #[EB.B.SBS|SZ] 641592 02:037 00:039 AAPL: #[EB|B:SHA] 02:069 00:032 AAPL: #[EB.WL.PWLFNV|!] Err(0x5) <- RT.GV wake-failure 7C436110-AB2A-4BBB-A880-FE41995C9F82 02:100 00:031 AAPL: #[EB.WL.DT|!] Err(0x5) <- EB.WL.PWLFNV 02:132 00:031 AAPL: #[EB.LD.LKC|D] <"System\Library\KernelCollections\BootKernelExtensions.kc.development"> 02:165 00:033 AAPL: #[EB.LD.LF|IN] 0 1 <"System\Library\KernelCollections\BootKernelExtensions.kc.development"> <"0"> 02:197 00:032 AAPL: #[EB.LD.OFS|OPEN!] Err(0xE) <"System\Library\KernelCollections\BootKernelExtensions.kc.development"> 02:229 00:032 AAPL: #[EB.LD.LKC|R.2] <"System\Library\KernelCollections\BootKernelExtensions.kc"> 02:262 00:032 AAPL: #[EB.LD.LF|IN] 0 1 <"System\Library\KernelCollections\BootKernelExtensions.kc"> <"0"> 05:350 03:088 AAPL: #[EB|SB:P] 0x1 05:381 00:031 AAPL: #[EB|SB:SBGMFNS] j137ap.im4m 05:413 00:032 AAPL: #[EB|SB:MF] System\Library\KernelCollections\BootKernelExtensions.kc.j137ap.im4m 05:446 00:032 AAPL: #[EB.LD.LF|IN] 0 1 <"System\Library\KernelCollections\BootKernelExtensions.kc.j137ap.im4m"> <"0"> 06:017 00:571 AAPL: #[EB|SB:MKRN] 06:066 00:048 AAPL: #[EB.LD.LKFS|-?] Ok(0) 06:097 00:030 AAPL: #[EB.LD.LKC|-?] Ok(0) 06:129 00:031 AAPL: #[EB|FWFM] 0x00000000FF1FFF3F 06:160 00:030 AAPL: #[EB|FWFT] 0x00000000FC0FE137 06:190 00:030 AAPL: #[EB|BST:REV1] 06:221 00:031 AAPL: #[EB|CSR:IN] 0x00000067 06:251 00:030 AAPL: #[EB|CSR:OUT] 0x00000067 06:283 00:031 AAPL: #[EB.BST.FBS|+] 06:314 00:031 AAPL: #[EB.BST.FBS|ADSZ] 0 06:345 00:030 AAPL: #[EB.BST.FBS|KSSZ] 0 06:376 00:030 AAPL: #[EB|SB:SBGMFNS] j137ap.im4m 06:407 00:031 AAPL: #[EB|RH:PF] usr\standalone\OS.dmg.root_hash 06:439 00:031 AAPL: #[EB|RH:MF] <"usr\standalone\OS.dmg.root_hash.j137ap.im4m"> 06:470 00:031 AAPL: #[EB.LD.LF|IN] 0 1 <"usr\standalone\OS.dmg.root_hash"> <"0"> 06:502 00:031 AAPL: #[EB.LD.OFS|OPEN!] Err(0xE) <"usr\standalone\OS.dmg.root_hash"> 06:534 00:032 AAPL: #[EB.RH.LRH|P!] Err(0xE) <- EB.LD.LF 06:565 00:030 AAPL: #[EB.BST.FBS|!] Err(0xE) <- EB.RH.LRH 06:596 00:031 AAPL: #[EB.B.WFDW|!WF] Err(0xE) 0 06:627 00:030 AAPL: #[EB|LOG:DT] 2020-10-23T19:16:34 06:659 00:031 AAPL: #[EB|LOG:EXITBS:START] 2020-10-23T19:16:34 `

[danausx]

These are the instructions to downgrade or dump Bios from an EFI shell if you ever need to

Use at your own risk!!! I only tested this downgrading from 3.02 to 2.0.1 on a Razer Blade Stealth Late 2017 RZ09-02393 and RZ09-02394.

Required items:

• OpenCore with OpenShell.efi tool enabled in config, auxiliary, timeout and picker enabled.

• AfuEfix64.efi inside your EFI partition

• Dumped file of the complete 2.0.1 Bios (Boot block and main Bios). Move this to the same folder as AfuEfix64.efi

To dump your curent Bios you can use:

AfuEfix64 bios.rom /o

Instructions

Boot to OpenShell.efi from OpenCore menu, find your EFI partition number location and type:

fsX: (example fs0:) dir (check if files match)

You can try different numbers or reference the list of devices of OpenShell startup.

Move to the folder where AfuEfix64.efi is and execute:

AfuEfix64 bios2-0-1.rom /P /B /L0

This should restore the bios and boot sectors and load CMOS defaults.

Reboot and you're done.