
iMac is a family of all-in-one Macintosh desktop computers designed and built by Apple Inc. It has been the primary part of Apple's consumer desktop offerings since its debut in August 1998, and has evolved through seven distinct forms.

The iMac G3, originally released as the iMac, is a series of Macintosh personal computers developed by Apple under the tenure of Apple's interim CEO and cofounder Steve Jobs after his return to the financially troubled company.

The iMac G4 is an all-in-one personal computer designed, manufactured, and sold by Apple Computer, Inc. from January 2002 to August 2004. It replaced the iMac G3 and was succeeded by the iMac G5.

The iMac G5 is an all-in-one personal computer that was designed, manufactured and sold by Apple Computer, Inc. from August 2004 to March 2006. It is the final iMac to use a PowerPC processor, making it the last model that could natively run Mac OS 9 (Classic) applications. It was replaced in January 2006 by the Intel-based iMac, which retained the features, price, and case design of the iMac G5.

The iMac with Apple silicon, also known as the iMac M1, is a Macintosh desktop computer designed, developed and marketed by Apple Inc. The first iMac with Apple silicon, a redesigned 24-inch model based on the Apple M1 ARM-based system on a chip, was released on May 21, 2021.

The Intel-based iMac is a series of Macintosh desktop computers designed, manufactured and sold by Apple Inc. since 2006. It is one of three desktop computers in the current Macintosh lineup, serving as an all-in-one alternative to the Mac Mini, and sits below the performance range Mac Pro. It was sold alongside the Xeon-based iMac Pro from 2017 to 2021.

The iMac Pro is a discontinued all-in-one personal computer and workstation designed, manufactured, and sold by Apple Inc. It was released on December 14, 2017. While it was sold, it was one of four desktop computers in the Macintosh lineup, sitting above the consumer range Mac Mini and iMac, and serving as an all-in-one alternative to the Mac Pro.