pet1 Posted January 31, 2016 Share Posted January 31, 2016 I just upgraded my intel core 2 duo setup to a z97 a usb 3.1 with 4790k. When I try try to boot off of my installed El Capitan drive or installer I get the following the kernel panic listed above. Link to comment https://www.insanelymac.com/forum/topic/310688-kernel-panic-appleacpiplatformexpert-start-failed/ Share on other sites More sharing options...
PPCnostalgic Posted January 31, 2016 Share Posted January 31, 2016 If you boot from USB installer and choose internal HD system as startup volume does it work? Link to comment https://www.insanelymac.com/forum/topic/310688-kernel-panic-appleacpiplatformexpert-start-failed/#findComment-2211945 Share on other sites More sharing options...
pet1 Posted January 31, 2016 Author Share Posted January 31, 2016 No. I get the same panic. Whether I boot from the usb installer or the installed drive. I'm using clover in legacy mode. Link to comment https://www.insanelymac.com/forum/topic/310688-kernel-panic-appleacpiplatformexpert-start-failed/#findComment-2212033 Share on other sites More sharing options...
kosakgroove Posted February 17, 2016 Share Posted February 17, 2016 This normally means you have a wrong SMBIOS for your system, and you are not using the right patches for your processor to run MacOSX. Take a look at the Clover bootloader, with its various kernel CPU patches. That may most likely solve your issue. You should figure out what generation of CPU you have (Haswell, Sandy Bridge, etc) and apply the appropriate Clover patch. Also you have El Capitan, and as you know there are many USB changes. MAybe you should generate new ACPI tables and patch them again. Hardware changes require new ACPI tables, so your build functions correctly Link to comment https://www.insanelymac.com/forum/topic/310688-kernel-panic-appleacpiplatformexpert-start-failed/#findComment-2216364 Share on other sites More sharing options...
Amey8a Posted March 24, 2016 Share Posted March 24, 2016 do you have appleacpiplatform kext in your usb extensions folder?......if yes then remove it, the installer will boot normally then after. Link to comment https://www.insanelymac.com/forum/topic/310688-kernel-panic-appleacpiplatformexpert-start-failed/#findComment-2226450 Share on other sites More sharing options...
jalavoui Posted March 25, 2016 Share Posted March 25, 2016 Delete or move DSDT.aml from efi/clover/acpi/patched Link to comment https://www.insanelymac.com/forum/topic/310688-kernel-panic-appleacpiplatformexpert-start-failed/#findComment-2226869 Share on other sites More sharing options...
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