While the default file system used on a Macintosh doesn't require defragmenting, you can do so with a thrid party utility called iDefrag. However, some argue that defragmenting a Mac actually hurts performance due to the nature of the file system's indexing.

AIFF means Auto Interchange File Format used in the Apple Macintosh operating system. It is a file for storing audio digital sound data

Dale Dougherty has written:

'The Mosaic handbook for the X Window System' -- subject(s): X Window System (Computer system), Mosaic (Computer file), Internet

'The Mosaic handbook for the Macintosh' -- subject(s): Internet, Macintosh (Computer), Mosaic (Computer file)

'A guide to the Pick system' -- subject(s): Operating systems (Computers), Pick (Computer file)

'The Mosaic handbook for Microsoft Windows' -- subject(s): Internet, Mosaic (Computer file)

Macintosh computers use a completely different operating system and utilize different file types. However, you can still run Windows software on most Macintosh computers through applications such as Bootcamp.

If your PC is not a Macintosh then Macintosh software will not work with it as it is a different, and incompatible, system.