SelAtRans
SelAtRans is a native macOS utility for translating selected text between English and Simplified Chinese. It provides configurable shortcuts and a streaming floating preview.
In supported editable fields, translations can replace the selection in place. When replacement is unsafe or unavailable, the result is copied to the clipboard. The app uses a user-configured, OpenAI-compatible API provider.
See the repository for accessibility permissions, setup instructions, and release downloads.