[BUG] Cowork + Chat tabs disappear after auto-update 1.18286.2 → 1.19367.0 (VM healthy, zero process spawns, sessions-bridge poll aborts) — macOS

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Summary

After the desktop app auto-updated from 1.18286.2 → 1.19367.0 (applied on relaunch
Jul 7, 2026 3:55 PM local), the Chat and Cowork tabs vanished from the app —
only Code remains — and no Cowork work runs. The Cowork backend on my machine is fully
healthy; the client simply never dispatches work to it. This matches the "Cowork tab missing
after auto-update" regression class (see related issues below).

Environment

• Claude Desktop 1.19367.0 (regressed from 1.18286.2)
• macOS Tahoe 26.5.2, MacBook Pro (Apple Silicon)
• Claude Pro subscription
• Full uninstall + clean reinstall performed — did not resolve it

Timeline (from ~/Library/Logs/Claude/)

• Jul 7, 12:02 PM — last successful Cowork activity. cowork_vm_swift.log shows its final

Process spawned entry (session magical-exciting-franklin). 686 spawns before this point,
zero after.

• Jul 7, 3:55 PM — update applied at relaunch. main.log:

[updater] Version changed since last launch: 1.18286.2 → 1.19367.0

• Jul 7 evening → Jul 8 — every launch shows the same broken pattern below.

Key evidence — VM is healthy, but no work ever starts

Across ≥4 VM boots after the update (Jul 7 7:55 PM; Jul 8 6:44 AM, 7:25 AM, 11:25 AM) the VM
boots cleanly and recovers sessions, yet zero processes ever spawn, while main.log's
sessions bridge repeatedly aborts its poll loop.

<details>
<summary>VM boots clean (cowork_vm_swift.log / coworkd.log)</summary>

What Should Happen?

After a desktop-app auto-update, the Chat, Cowork, and Code tabs should all remain
present and functional. On a Pro plan with a healthy Cowork VM, starting a Cowork
session should spawn worker processes and run work as it did on 1.18286.2.

Error Messages/Logs

Source: ~/Library/Logs/Claude/

Update applied (main.log):
[updater] Version changed since last launch: 1.18286.2 → 1.19367.0

VM boots clean but never does work (cowork_vm_swift.log / coworkd.log):
[VM] 2026-07-08 07:25:13 [info] Installed 2 host CA certificates in guest
[VM] 2026-07-08 07:25:13 [info] API reachability: REACHABLE
[VM] 2026-07-08 07:25:13 [info] SDK installed successfully: version=2.1.202
[KERNEL] 2026/07/08 10:44:10 [coworkd] user recovery complete: recovered=91 skipped=1 failed=0

cowork_vm_swift.log: last "Process spawned" entry was Jul 7 12:02 PM (session
magical-exciting-franklin); 686 spawns before that point, ZERO after the update.

Meanwhile sessions-bridge poll loop repeatedly aborts (main.log):
2026-07-08 11:13:34 [error] [sessions-bridge] Poll error, backing off: This operation was aborted
2026-07-08 11:31:02 [error] [sessions-bridge] Poll error, backing off: This operation was aborted
2026-07-08 11:48:14 [error] [sessions-bridge] Poll error, backing off: This operation was aborted
2026-07-08 15:10:01 [error] [sessions-bridge] Poll error, backing off: This operation was aborted

Full logs available on request: main.log, coworkd.log, cowork_vm_swift.log, cowork_vm_node.log

Steps to Reproduce

1. Run Claude Desktop 1.18286.2 on macOS with Cowork working normally (tabs present,

sessions spawning processes).

1. Allow the app to auto-update to 1.19367.0 and relaunch.
2. Observe the app window: only the Code tab is present — Chat and Cowork tabs are gone.
3. Start (or attempt to resume) a Cowork session.

Result: The Cowork VM boots cleanly and recovers sessions, but zero processes spawn and
no work runs. A full uninstall + clean reinstall does NOT restore the missing tabs.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

1.18286.2

Claude Code Version

You're running Claude Code v2.1.160. But, this problem started manifesting in Claude Desktop 1.19367.0 (regressed from 1.18286.2) and is still present.

Platform

Claude Desktop

Operating System

macOS

Terminal/Shell

Other

Additional Information

Signature: healthy VM + zero spawned processes + sessions-bridge poll aborts → points to
the client entitlement / feature-flag / UI-preload layer, not the VM, network, or account.
Given the exact version pair and timestamps, this should be reproducible as a diff between
1.18286.2 and 1.19367.0.

Related issues (same "Cowork tab missing after auto-update" class):

• #48407 (open) — Cowork tab missing, Windows 11
• #75321 (open) — Cowork tab missing, Windows 11 Home 25H2 (status=unsupported)
• #48310, #49748, #51871 (closed) — same class

Account: Claude Pro. Full uninstall + clean reinstall performed; did not resolve.