claude-code - 💡(How to fix) Fix [BUG] 1.3036.0 (cf521c): All Cowork sessions crash with "exited with code 1" on macOS - Desktop-to-SDK spawn failure, SDK 2.1.111 [20 comments, 15 participants]

From ~/Library/Logs/Claude/main.log: 2026-04-16 14:45:10 [info] [LocalAgentModeSessionManager] SDK version 2.1.111 will be used 2026-04-16 14:45:10 [info] Using Claude VM spawn function for session 2026-04-16 14:45:10 [info] [Lifecycle] Session local_38cf1389...: initializing → running 2026-04-16 14:45:11 [error] Session local_38cf1389... query error: Claude Code process exited with code 1 2026-04-16 14:45:11 [info] [Lifecycle] Session local_38cf1389...: running → idle 2026-04-16 14:45:11 [info] [CycleHealth] Unhealthy cycle: { session_id: 'local_38cf1389-ef67-4b00-be9e-b9ad6c431520', vm_instance_id: '699449a1-66d4-4725-b31a-6256cf3df68c', model: 'claude-opus-4-7[1m]', cycle_health: 'unhealthy', had_first_response: false, seconds_to_outcome: 3, is_resume: false, unhealthy_reason: 'system_error', error_message: 'Claude Code process exited with code 1', error_category: 'process_crashed' }

TL;DR

The issue is likely related to the recent update of Claude Desktop to version 1.3036.0, causing the Claude Code process to exit with code 1, and a potential workaround could be to revert to a previous version of Claude Desktop or wait for a patch.

Guidance

• The crash occurs after the VM instance is assigned and the session transitions to running, suggesting a potential issue with the Claude Code process or the interaction between the Claude Desktop and the Claude Code.
• The fact that the crash reproduces across different models (Opus 4.7, Opus 4.6, Sonnet 4.6) and that there are no stderr output, CSP violations, or VM boot errors visible in main.log, indicates that the issue might be related to the Claude Desktop update rather than a specific model or configuration.
• To mitigate the issue, users could try to revert to a previous version of Claude Desktop, if possible, or wait for a patch or update that addresses the problem.
• It's also worth noting that the troubleshooting steps already attempted (full quit and relaunch, sign out and sign back in, clearing cache and restart) did not resolve the issue, suggesting that the problem might be more complex.

Notes

The issue seems to be specific to the macOS platform and the Anthropic API, and it's not clear if this issue affects other platforms or APIs.

Recommendation

Apply workaround: Revert to a previous version of Claude Desktop, if possible, as the current version (1.3036.0) seems to be the cause of the issue.