Early test build of CodeMate for macOS — notarized, ready to run without a Gatekeeper warning. DSA practice with a real IDE-style editor and per-test-case grading, an on-device AI assistant, LLD/HLD whiteboard, guided roadmap, and Free/Pro/Max tiers. Download CodeMate.dmg, open it, and drag CodeMate to Applications. (A plain CodeMate.zip is also attached if you'd rather skip the disk image.)