Answer:
A waterproof fabric
The Macintosh (pronounced or Mac, is a series of several lines of personal computer designed, developed, and marketed by Apple Inc. The first Macintosh was introduced on January 24, 1984; it was the first commercially successful personal computer to feature a mouse and a graphical user interface rather than a command-line interface.
Alternatively, The McIntosh Red (or McIntosh, colloquially "the Mac") is an apple cultivar with red and green skin, a tart flavor, and tender white flesh. It becomes ripe in late September. This is probably where Apple (the computer company) got the name for the computers.