Mac OS X 10.5 Help
Using Windows files on a Mac
The most popular Mac applications use the same file formats as their Windows counterparts, making it easy to open and use files created on Windows PCs on your Mac.
Here are some of the common file types:
Productivity: plain text (.txt), rich text (.rtf), Word (.doc), Dbase (.dbf), Excel (.xls), PageMaker (.pm3, 4, 5, 6), PowerPoint (.ppt), Quark XPress (.qdx), Quicken (.qdf)
Media: MP3 (.mp3), AAC (.aac), AIFF (.aiff), ASF (.asf), AVI (.avi), MIDI (.midi), MPEG-1, MPEG-2, and MPEG-4 video (.mpg, .mp2, .mp4), QuickTime Movie (.qt, .mov), Real Audio/Video (.ra, .ram), Wave Form Audio (.wav), Windows Media Audio and Video (.wma, .wmv)
Graphics: BMP (.bmp), GIF (.gif), JPEG (.jpg), TIFF (.tif), PICT (.pct), EPS (.eps), Photoshop (.ps), PostScript (.ps), PDF (.pdf)
Internet: HTML (.html, .htm), MIME (.mim, .mime), XML (.xml)
Compression: Stuffit (.sit) and ZIP (.zip)
Filename extensions are usually hidden in Mac OS X. To show the filename extension for all files, choose Finder > Preferences, click Advanced, and then select “Always show file extensions.”