How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

[lucke77]

I tested a new installation of HS 10.13.6 on a new ssd, and I opted to use a new procedure to create a USB stick and keep the file system in HFSj +.
attached file below: Patched OSInstaller.framework By crazybirdy

 

[dMatik]

yes..that code working xcpm.
but.. slow performance..
not working overclocking.


We need new solution

The strange thing is that the same code works on haswell-e, and does full oc, same performance as 10.13.5. My concern now is mojave.

 

[lucke77]

yes..that code working xcpm.
but.. slow performance..
not working overclocking.


We need new solution

How did you test overclocking?

 

[cocoanut]

Hi guys,
To get a working xcpm I inserted this patch below, found on insanelymac (thanks to cfszs, that managed to find the correct binary file):

performance fix for 10.13.6 (17G65)

find
C1 E3 08 48 63 D3 89 D0 48 C1 EA 20 B9 99 01 00 00 0F 30 48 FF 05 79 B0 6B 00 48 83 C4 08 5B 5D C3 66 2E 0F 1F 84 00 00 00 00 00

replace
BB 00 FF 00 00 48 63 D3 89 D0 48 C1 EA 20 B9 99 01 00 00 0F 30 48 FF 05 79 B0 6B 00 48 83 C4 08 5B 5D C3 90 90 90 90 90 90 90 90

I continued to use, as always indicated by kgp, the FAKECPUID of Broadwell-E: 0x040674
and, to check if the xcpm is active, use the command as proposed by kgp in its great guide: "sysctl machdep.xcpm.mode"
in my case the result is: 1, so everything works properly. Tested, it's working.

 

[tete002]

How did you test overclocking?

check intel cpu gadget & run benchmark software

 

[P1LGRIM]

@kgp

Typo in the guide ?
In Section C.) Important General Note/Advice and Error Prevention
Item 7 talks about editing the TSCAdjustRest.kext and concludes in sub section e.) with :

copy the modified VoodooTSCSync.kext to the /EFI/CLOVER/kexts/Other/ - directories of both USB Flash Drive Installer and System Disk

Surely that should read as "copy the modified TSCAdjustRest.kext" ?

 

[lucke77]

@kgp

Typo in the guide ?
In Section C.) Important General Note/Advice and Error Prevention
Item 7 talks about editing the TSCAdjustRest.kext and concludes in sub section e.) with :

Surely that should read as "copy the modified TSCAdjustRest.kext" ?

No..., read:#1857

 

[P1LGRIM]

No..., read:#1857

Irrelevant.

 

[lju88]

I'm not able to flash the bios. I have the very same mobo as the guide (X99-A II). Tried to patch the file and tried the file attached to the guide, none worked. My USB drive is FAT32 formatted, I connected it on the right USB port, I tried different USB drives and tried both pressing the flash button for 3 seconds and through EZ Flash 3 utility: none of them worked. The utility says: 'Selected file is not a proper BIOS!'.
My current firmware is 1801 (updated through EZ Flash 3) and I tried to patch both the 1902 beta and 1801 too.
Dunno what I should do to solve it, I've found a very few on this matter online.

 

[GDS]

Had same problem before
I dont know how I managed to flash it but now it is ok

in any clase to not be locked on this part you can add a line on clover (see the 1st topic)
it will (for a while) let you manage without the modded bios

good luck

I'm not able to flash the bios. I have the very same mobo as the guide (X99-A II). Tried to patch the file and tried the file attached to the guide, none worked. My USB drive is FAT32 formatted, I connected it on the right USB port, I tried different USB drives and tried both pressing the flash button for 3 seconds and through EZ Flash 3 utility: none of them worked. The utility says: 'Selected file is not a proper BIOS!'.
My current firmware is 1801 (updated through EZ Flash 3) and I tried to patch both the 1902 beta and 1801 too.
Dunno what I should do to solve it, I've found a very few on this matter online.