MacWrite II Document (.mcw)
The MCW file extension stands for MacWrite II Document, a text file format created by Apple for its MacWrite II word processing program, which is now discontinued. These documents store text and basic page formatting information and can be opened by MacWrite II, ClarisWorks, and AppleWorks. Given the discontinuation of these programs, users may need to convert MCW files to more common formats like DOC or DOCX for compatibility with modern word processors.