OpenCode desktop app (v1.2.27) shows blank window on macOS 12.7.6 (Monterey). #18530

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1. lindechang

   added

   bugSomething isn't workingSomething isn't working

   on Mar 21, 2026
2. github-actions

   assigned

   Brendonovich

   on Mar 21, 2026
3. github-actions

   added

   webRelates to opencode on web / desktopRelates to opencode on web / desktop

   on Mar 21, 2026
4. github-actions commented on Mar 21, 2026

   

   github-actionsBot

   on Mar 21, 2026 – with GitHub Actions

   Contributor

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   This issue might be a duplicate of existing issues. Please check:

   • macOS desktop app: just a blank window #5643: macOS desktop app shows blank window — same macOS 12.7.6 (Monterey), same symptom (closed, may have a resolution)
   • MacBook Pro 2020 Intel 12 Monterey Open Black Screen #8135: MacBook Pro 2020 Intel Monterey desktop shows black screen — same hardware/OS combination
   • 我打开应用就是白屏--mac #13044: Mac desktop app shows white screen (open)
   • Desktop white screen #18024: Desktop white screen, CLI works fine — same symptom pattern

   Please review these issues to see if any apply to your situation, and consider adding your findings there if so.
5. Dragoy commented on Mar 30, 2026

   

   Dragoy

   on Mar 30, 2026

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   I hit the same blank window on macOS 12.7.6 Monterey (Intel i7-6820HQ) with v1.3.7.

   Did some digging — the sidecar starts fine, health check passes, WebKit confirms the page loaded (didFinishLoadForFrame), but the SPA never mounts.

   The likely root cause (also seen in #5643) is that the compiled JS bundle uses regex syntax that WebKit on macOS 12 does not support (SyntaxError: Invalid regular expression: invalid group specifier name). Safari 17.6 on Monterey ships an older JavaScriptCore that lacks named capture group support in certain patterns. The script fails to parse, so nothing renders — no error boundary, no fallback, just the bare theme background.

   The LSMinimumSystemVersion in Info.plist is set to 10.13, which implies macOS 12 should be supported. Either the minimum needs to be bumped, or the Vite/esbuild target needs to be lowered to avoid emitting unsupported syntax for the WebKit version shipped with macOS 12.
6. thdxr

   removed

   bugSomething isn't workingSomething isn't working

   webRelates to opencode on web / desktopRelates to opencode on web / desktop

   on May 3, 2026
7. github-actions commented on Jul 4, 2026

   

   github-actionsBot

   on Jul 4, 2026 – with GitHub Actions

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   To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.
8. github-actions

   closed this as not plannedon Jul 4, 2026