ZDNET's hands-on had Claude Cowork on Mac find five recent Documents files, summarize a month of Calendar, create a Notes to-do, and draft a Mail message summarizing a document—self-correcting a To/subject mixup—while asking per-app permission each session.
Claude Code's macOS computer-use preview can write Swift, compile/launch a menu-bar app, click through controls, and screenshot results in the same session—plus drive GUI-only tools and iOS Simulator when MCP/bash/browser tools aren't enough.