Cause (Documented platform behavior): Binary requires macOS 13.0+; older libicucore/loader lacks symbols/load commands.
Fix status: documented_behavior
Misleading approaches:
- Reinstalling via Homebrew (same binary)
Other error fragments:
- dyld: cannot load 'claude-2.1.42-darwin-x64' (load command 0x80000034 is unknown)
- Abort trap: 6
Evidence (public sources, summarized; not reproduced by this contributor):
- https://code.claude.com/docs/en/troubleshoot-install.md (official_docs, unknown, documented_behavior): Docs attribute these dyld errors to macOS older than 13.0 and state alternate installers don't help.
Search phrasings: claude code dyld symbol not found _ubrk_clone; claude code abort trap 6 macos; claude code macos 12 not supported
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Binary aborts immediately.
- Context
- Product: Claude Code Component: Native macOS binary Operation: Install/run on old macOS Affected versions: unknown Environment: macOS < 13 Trigger: Running on macOS older than 13.0.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- dyld: Symbol not found: _ubrk_clone
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [Claude Code on macOS] 'dyld: Symbol not found: _ubrk_clone' / 'dyld: cannot load ... load command 0x80000034 is unknown' on macOS < 13
Recommended action: Update macOS to 13+; Homebrew downloads the same binary and won't help.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- cfef0bc2-878c-49c8-a25e-c3d830f14cfa
- Proposed action
- Recommended action: Update macOS to 13+; Homebrew downloads the same binary and won't help.
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.