How to Fix Big Sur 11.2.1 on Lenovo X260
This mini-guide provides a structural approach to troubleshoot and fix the issue.
Prerequisites
- Confirm your hardware specifications (CPU, GPU, Motherboard).
- Ensure you have a bootable recovery USB and backup your EFI.
Fix Steps
- Verify your network controller model (Intel, Broadcom, Realtek).
- Ensure the correct kext (e.g., AirportItlwm or BrcmPatchRAM) is loaded in your config.
- Clear network interfaces and reset NVRAM if changes don't apply.
Verification
- Reboot and verify if the functionality is restored and stable under typical usage.
Original Question:
Worked on this for quite a few days, had a problem that caused a very lengthy boot time of about 20 minutes, but finally figured that out (DSDT) and I've got a success! Installed 11.2 and upgraded in place to 11.2.1. Certainly doesn't perform like my M1 Air, but was a lot more fun.
CPU: Intel Core i7 6500U @ 2.8GHz
Bootloader: OpenCore 0.6.6
GPU: Intel HD graphics 520
RAM: 8GB DDR4-2133 Memory
Make and Model: Lenovo ThinkPad x260
Audio Codec: Realtek ALC3245
Ethernet Card: Intel I219-LM
Wifi/BT Card: Intel Dual-band AC8260
BIOS revision: 1.47 released Sept 2020
Trackpoint does not function, but this seems pretty common from what I've read. Or the SD card reader. Also still working to figure out why it doesn't wake from sleep, but otherwise everything else seems functional!
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