Sc

Lightweight macOS overlay chat for windowed and borderless-fullscreen games.

English · 简体中文

Screenshots

Feature Showcase / 功能展示

Control Center

Overlay Chat

Light / Dark Appearance / 深浅色展示

Control Center in light and dark appearance

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English

Sc is a lightweight macOS overlay chat app for windowed and borderless-fullscreen games. It uses private IRC-backed sessions with shareable invite codes and a lower-left in-game-style chat bar that can be toggled with Command + /.

Features

• Lower-left overlay chat bar designed for game-style communication
• Global Command + / hotkey to show or hide the chat window
• Private single-session rooms with randomized channel names and passwords
• SC1: invite codes for sharing and joining conversations
• Automatic pop-up previews when new messages arrive while the overlay is hidden
• Scrollable chat history inside the overlay window
• Standard SwiftUI control center for creating, joining, stopping, and managing sessions
• Configurable nickname, server, opacity, font size, width, and spacing
• Built-in IRC server presets and custom server support
• English and Simplified Chinese interface support with manual in-app switching
• Nicknames restricted to English letters and numbers for IRC compatibility
• Full-screen hotkey fallback with macOS Input Monitoring support

Download

• Prebuilt app: GitHub Releases

Run From Source

1. Open Sc.xcodeproj in Xcode
2. Select the Sc scheme
3. Run it on your Mac

Or build from the command line:

xcodebuild -project Sc.xcodeproj -scheme Sc -configuration Debug CODE_SIGNING_ALLOWED=NO build

Workflow

1. Launch the app and open the control center
2. Create a session or paste an invite code to join one
3. Use Command + / to open the overlay chat once connected
4. Stop the current session from the control center when done

Notes

• Session creators and joiners must use the same IRC server
• If one server is unavailable, switch to another preset or your own server
• In advanced settings, entering 0 means no limit: messages are not truncated and previews do not auto-hide

Permissions

• Standard global hotkeys usually work in normal windowed apps
• Some full-screen apps require Input Monitoring
• Accessibility permission is usually not required
• If macOS says the app is damaged, run sudo xattr -rd com.apple.quarantine /path/to/Sc.app

Project Structure

• Sc/: application source
• ScTests/: unit tests
• docs/images/: README screenshots
• project.yml: XcodeGen configuration

License

This project is licensed under the MIT License. See LICENSE for details.

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简体中文

Sc 是一个面向窗口化和无边框全屏游戏场景的 macOS 悬浮聊天工具。它基于私密 IRC 会话工作，通过可分享的邀请码加入，并提供一个固定在左下角、可用 Command + / 呼出或隐藏的游戏风格聊天栏。

功能

• 左下角游戏风格悬浮聊天栏
• 全局 Command + / 快捷键呼出或隐藏聊天窗口
• 单会话私密房间，自动生成随机频道名和密码
• SC1: 邀请码分享和加入流程
• 聊天栏隐藏时，新消息自动弹出预览
• 悬浮窗内支持滚动查看聊天历史
• 标准 SwiftUI 控制中心，可创建、加入、停止和管理会话
• 可配置昵称、服务器、透明度、字号、宽度和边距
• 内置 IRC 预设服务器，并支持自定义服务器
• 支持 English / 简体中文，并可在应用内手动切换
• 昵称只允许英文和数字，以兼容 IRC 服务器
• 对全屏应用提供基于 macOS Input Monitoring 的热键兜底

下载

• 已编译版本：GitHub Releases

从源码运行

1. 用 Xcode 打开 Sc.xcodeproj
2. 选择 Sc scheme
3. 直接运行到本机

也可以使用命令行构建：

xcodebuild -project Sc.xcodeproj -scheme Sc -configuration Debug CODE_SIGNING_ALLOWED=NO build

使用流程

1. 打开应用，进入控制中心
2. 创建会话，或粘贴邀请码加入
3. 连接成功后，用 Command + / 呼出聊天栏
4. 使用结束后，在控制中心停止当前会话

注意

• 创建会话的人和加入会话的人必须使用同一个 IRC 服务器
• 如果某个服务器不可用，请切换到其他预设或你自己的服务器
• 在高级设置里输入 0 表示不限：消息不截断，预览不自动收起

权限说明

• 普通窗口应用下，全局热键通常可直接使用
• 某些全屏应用需要开启 Input Monitoring
• 一般不需要 Accessibility 权限
• 如果 macOS 提示应用已损坏，可运行 sudo xattr -rd com.apple.quarantine /path/to/Sc.app

项目结构

• Sc/：应用源码
• ScTests/：单元测试
• docs/images/：README 截图资源
• project.yml：XcodeGen 配置

License

本项目使用 MIT License。详见 LICENSE 文件。