Select your monitor’s native resolution (e.g., 1920x1080 or 2560x1440). The 1.12.1 client natively supports widescreen formats, though UI elements may look slightly stretched without modern scaling modifications.
Uses an older Lua scripting system that is harder to master than the modern API. WoW Vanilla Installation Guide (1.12.1 client) WoW Vanilla Client 1.12.1 Portable Download Pc