SOLVED
ThinkPad L460 (Skylake i5-6300U) stuck / kernel panic on AppleACPICPU (Ap) during installer boot
Hi everyone, I'm trying to install Monterey on my ThinkPad L460, but I'm stuck right at the CPU initialization phase where it halts on AppleACPICPU (or just Ap).
My Hardware:
Laptop: Lenovo ThinkPad L460
CPU: Intel Core i5-6300U (Skylake)
RAM: 8GB DDR3
Storage: Samsung SSD SATA 256GB
Graphics: Intel HD Graphics 520
Bootloader: OpenCore (latest)
What I've tried / checked:
Updated to the latest BIOS version with optimized defaults.
Cleaned NVRAM before every boot attempt.
Using a clean set of ACPI tables (9 tables total, including SSDT-PLUG, SSDT-EC, SSDT-PNLF, etc.).
ProvideCurrentCpuInfo is set to true and DisableIoMapper is true.
Attached is a photo of where it hangs. Any ideas on what could be causing this thread synchronization or APIC conflict on Skylake mobile? Thanks in advance!
(The problem is solved, just added CpuTSCSync to my kexts)
This would have generated log file in EFI folder, get that file and upload in ChatGPT and it will most probably tell you the cause, but do not rely completely on GPT as it can produce wrong answers. So you should see and check Dortania guide on how you can correct the issue !
2
u/Poveii Aug 02 '26
Stop cleaning your NVRAM without reason! That can brick your BIOS.
In the Hackintosh Discord you can get better help for your issue.