pqrs-org/Karabiner-Elements

Driver fails to load in macOS Catalina 10.15.7

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#2473 opened on Oct 21, 2020

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bughelp wanted

Description

After updating macOS to 10.15.7, the Karabiner Elements driver fails to load, even after allowing it in system preferences:

image

I have uninstalled and reinstalled from a fresh download of Karabiner Elements, and also tried the Deactivate/Activate sequence described in the screenshot.

Contributor guide

Tech stack
cppshell
Domain
backendsecurity
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
macOS system extension knowledgeC++ debuggingKarabiner driver architecture
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
Investigate the driver loading mechanism in the Karabiner Elements source code, specifically the kernel extension or 'kext' files. Check for changes in macOS 10.15.7 that may have deprecated or changed driver loading behavior. Review the comments in the issue for any workarounds or additional diagnostics. Consider testing on the same macOS version to reproduce the issue. Look for related issues or commits that address similar driver loading problems.