Claude Code Install Fixes: Windows, macOS, and Linux
Match the error on your screen to the right fix: installer, PATH, permissions, or proxy.
Find the cause. Fix one thing. Prove it worked — without needing to understand the whole stack first.
Each tool page keeps its errors, guides, and source status in one place.
Clear branches, one change at a time, and a check that proves the fix.
Match the error on your screen to the right fix: installer, PATH, permissions, or proxy.
First determine whether your shell cannot find Codex or Codex cannot finish signing in.
Start with the feature that failed—sign-in, chat, or Tab—then check the setting that controls it.
Ignore the final exit message and find the first build error—the file or setting to fix is usually there.
Before writing another prompt, decide whether another patch is safe. These are the signals that call for tests, a focused review, or a proper handoff.
Normalize the scope before you compare totals. Price the prototype audit, build, account ownership, and source handoff on the same terms.