How to Fix Thinkpad T440s fan doesn't work in macOS
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
- Boot with
-v keepsyms=1 debug=0x100to identify the exact kernel panic. - Validate your config.plist using ocvalidate.
- Ensure your EFI matches the Dortania guide specifications for your CPU generation.
Verification
- Reboot and verify if the functionality is restored and stable under typical usage.
Original Question:
The fan is intact, but in macOS, it doesn't spin at all and becomes a Chromebook. Diagnostics show nothing wrong with the fan, and running them with the bottom case open, I can confirm. Opencore doesn't see the fan or something, and I want to fix this so I can get better performance out of this thing.
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