Apple's all-in-one desktop computer is the iMac. Unlike a traditional desktop tower, an iMac integrates the computer's main components and display into one enclosure, reducing cable clutter and simplifying setup.
Apple introduced the original iMac in 1998, during Steve Jobs's return to the company. The colorful iMac G3 used a translucent, rounded CRT enclosure and emphasized easy internet access. Its distinctive design helped re-establish Apple as a consumer technology and design brand.
The iMac line changed substantially over time. The iMac G4 placed a flat display on an adjustable arm above a hemispherical base, while later generations integrated the components behind increasingly thin LCD screens. Since 2021, the iMac has used Apple's own M-series processors.
The other options describe different Mac categories. The Mac mini is a compact computer that normally requires a separate display, the Mac Studio is a high-performance desktop without a built-in screen, and the Mac Pro is Apple's professional workstation. The iMac is the Mac designed as a complete all-in-one desktop system.