Macintosh Quadra

The Macintosh Quadra is a family of personal computers designed, manufactured and sold by Apple Computer, Inc. from October 1991 to October 1995. The Quadra, named for the Motorola 68040 central processing unit, replaced the Macintosh II family as the high-end Macintosh model.

The first models were the Quadra 700 and Quadra 900, both introduced in October 1991, with the latter discontinued after six months and replaced by the Quadra 950. The Quadra 800 was added in February 1993 (succeeding the Quadra 700), followed the multimedia-focused 840AV at the end of July 1993. The Macintosh Centris line was merged with the Quadra in October 1993, adding the 610, 650 and 660AV to the range. The 605 (also sold as the Performa 475 or LC 475) was also introduced in October 1993, featuring the 68LC040 (lacking an FPU) as standard although it could be upgraded to the full 68040. After the introduction of the Power Macintosh line in early 1994, the Quadra 630 (using the "full" Motorola 68040 instead of the LC's 68LC040) became the last new Quadra member. The Quadra 950 continued to be sold until October 1995.

The product manager for the Quadra family was Frank Casanova who was also the Product Manager for the Macintosh IIfx.