Jump to content

z840 dual processor upgrade 4c 8t to 14c 28t now OSX Catalina wont boot

8 posts in this topic

Recommended Posts


I need help!

I went from dual E5-2637 v3 - 4 core 8 threads and no problems

to dual E5-2690v4 -14 cores 28 threads not OSX Catalina wont boot

not sure how to fix this

attached please find a screen shot of the boot screen


any help / suggestions are welcomed




Posted (edited)



I cant read or access the catalina EFI partition from windows on the z840

I mounted the catalina boot USB into my mojave vm and found out that the catalina usb does not contain a dsdt file only SSDT-OLARILA.aml


not sure now how to proceed?


Edited by pcuser32
added info: also system no longer boots from USB either
Posted (edited)

added newly generated dsdt file to the catalina usb to no avail

same result as screen shot

is there no one who knows how to fix this?

Edited by pcuser32
more info: just created new VoodooTSCSync.kext also to no avail
  • 1 month later...
  • Create New...