在SC45文件擴展名代表有SC 4.5,主要與SuperCard有關。由SuperCard開發的項目文件被認為是一個Mac OS X的高層次的可視化創作工具,包括應用程序資源,腳本和用戶界面組件,並具有存儲數據文件的SUPERCARD運行的能力。類似於蘋果的HyperCard的技術,它也包含了執行“堆棧”多個窗口。在SC45文件擴展名通常用於創建軟件,教學實用工具和演示文稿。通過使用免費SuperCard播放器,SuperCard工程可以被執行,然而該文件並不限於此,因為這些文件的擴展名可以被內置到單獨的Mac OS X上的軟件。 SuperCard往往被視為難以提供信息,但經過季節,它很快被證明是在腳本環境堅如磐石的工具。接受的SC45文件擴展名的應用是解決諸如此類SuperCard,諸如此類的解決方案superedit而解決諸如此類SuperCard球員。
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.