在SC45文件扩展名代表有SC 4.5,主要与SuperCard有关。由SuperCard开发的项目文件被认为是一个Mac OS X的高层次的可视化创作工具,包括应用程序资源,脚本和用户界面组件,并具有存储数据文件的SUPERCARD运行的能力。类似于苹果的HyperCard的技术,它也包含了执行“堆栈”多个窗口。在SC45文件扩展名通常用于创建软件,教学实用工具和演示文稿。通过使用免费SuperCard播放器,SuperCard工程可以被执行,然而该文件并不限于此,因为这些文件的扩展名可以被内置到单独的Mac OS X上的软件。 SuperCard往往被视为难以提供信息,但经过季节,它很快被证明是在脚本环境坚如磐石的工具。接受的SC45文件扩展名的应用是解决诸如此类SuperCard,诸如此类的解决方案superedit而解决诸如此类SuperCard球员。
SuperCard is development software that uses the programming language called SuperTalk, which is based on the language used in HyperCard. SuperTalk is capable of calling out to OSA-based scripting languages like AppleScript, and shell commands. The language is extended with the use of externals, which are group of compiled code that appear like native routines. Programs that are created with the use of SuperCard are able to run inside the IDE itself as a standalone, it combines the programs created by the users and resources through the execution engine. The software supports Mac OS X’s Spotlight indexing and search mechanism. Spotlight indexes contents in the project’s scripts and text fields. The existing projects which are opened with SuperCard 4.7, will be indexed automatically. The project-level properties, dontIndexFields and dontIndexScripts, allows users to control what is indexed for specific projects. The projects that are found by the Spotlight search will receive a spotlightRequest message with the characters entered for the search, when the projects will be opened from the Spotlight menu. SuperCard runs on Macintosh computers, under Mac OS 8, Mac OS 9, and Mac OS X.