Open-source MCP server lets Claude Code drive Mac apps, 12x cheaper than rivals
_Ar5en1c_ · reddit · 2026-10-15
Built with Claude Code and MIT-licensed (a Ghost OS fork), YouxPC exposes a Mac window to any MCP client as a text list of accessibility elements with stable ids, so the agent clicks in the background via pcclick index:"e7" without moving the mouse; ambiguous button names are refused, and multi-action calls are supported.
Benchmark (17 tasks × 3 runs, all driven by Claude Haiku 5.5 on one M1):
- YouxPC: 50/51 runs, 630 s, 2.05M tokens
- Cua Driver: 51/51, 1,287 s, 23.9M tokens
- Ghost OS 2.2.1: 46/51, 1,176 s, 9.0M tokens
- Peekaboo: 41/51, 1,897 s, 43.6M tokens
Slightly less reliable than Cua Driver but half the time and 1/12th the tokens; on par with Playwright MCP on the 13 web-only tasks. Caveats: macOS only, author wrote 7/17 tasks, VS Code's accessibility tree is near-empty. Code: github.com/Ar5en1c/youxpc
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