Apple iMac MRT42LL/A All-in-One Desktop — 21.5" Retina 4K, Intel Core i5 8th Gen

Discover the seamless blend of style and performance with the Apple iMac MRT42LL/A, a 21.5-inch all-in-one desktop designed to elevate everyday tasks and creative workflows. Powered by an 8th-generation Intel Core i5 processor and paired with ample memory, this iMac delivers responsive multitasking, crisp visuals, and a polished user experience in a compact, space-saving form. Whether you’re editing photos, compiling documents, streaming high-definition content, or handling light video projects, the MRT42LL/A brings speed, reliability, and Apple’s signature design into one elegant package.

• High-performance 8th‑Gen Intel Core i5 with 6 cores — The processor delivers solid, consistently smooth performance for everyday productivity, web browsing, photo editing, and multitasking across multiple apps. With a base clock around 3.0 GHz and 6 cores, you’ll experience responsive app launches, rapid file handling, and a comfortable main workspace even when juggling several tasks at once.
• Vivid 21.5-inch Retina 4K display — The 21.5" Retina 4K panel brings sharp text, crisp images, and rich color for immersive media consumption and precise editing. At this size, you get a comfortable viewing footprint for extended work sessions, with detailed rendering that’s ideal for design, photo touch-ups, and video previews.
• Smart storage configuration: 32 GB SSD + 1 TB HDD — This configuration pairs a compact 32 GB solid-state drive for snappy boot times and fast loading of essential apps with a roomy 1 TB hard drive for abundant file storage. The result is a balance of speed for your operating system and applications, alongside ample space for photos, documents, music, and video libraries.
• Dedicated Radeon Pro 560X graphics for creative tasks — The Radeon Pro 560X GPU accelerates graphics workloads and delivers smoother video playback, faster rendering in apps like iMovie and Final Cut Pro, and improved responsiveness when working with rich media projects or graphically demanding software on macOS.
• Elegant all‑in‑one design with Apple craftsmanship — The MRT42LL/A embodies Apple’s iconic aesthetic: a slim, durable aluminum enclosure that keeps cables minimal and your desk clean. The integrated hardware—display, processor, storage, camera, speakers, and ports—delivers a cohesive user experience with streamlined setup and everyday reliability.

Technical Details of Apple iMac MRT42LL/A

CPU: Intel Core i5-8500, 3.0 GHz, 6-core

RAM: 8 GB

Storage: 32 GB SSD + 1 TB HDD

Graphics: Radeon Pro 560X

Display: 21.5-inch Retina 4K

Model Year: 2019

Form Factor: All-in-One Desktop

Operating System: macOS

how to install Apple iMac MRT42LL/A

To set up your iMac MRT42LL/A, place the computer on a stable, flat surface and connect the power cable. Attach a keyboard and mouse or trackpad, then press the power button to boot. Follow the on-screen macOS Setup Assistant to select your language, region, and accessibility preferences. Sign in with or create an Apple ID to access iCloud, the App Store, and synchronized data across devices. If you’re migrating data from another Mac, use Migration Assistant to move apps, documents, and settings. Ensure you have an active internet connection for system updates and activation. For the dual-storage configuration, install frequently used apps on the SSD and store large media folders on the HDD to optimize performance and capacity. Regularly check for software updates to keep macOS secure and compatible with new features.

Frequently asked questions

• What display size and resolution does this iMac offer? — It features a 21.5-inch Retina 4K display, delivering high pixel density and clear visuals ideal for work and entertainment.
• How much memory does it include? — The system comes with 8 GB of RAM, which provides solid performance for everyday tasks and light creative work.
• What storage configuration is included? — The model combines a 32 GB SSD with a 1 TB HDD, balancing fast booting and responsive app loading with generous storage capacity for files and media.
• Is the MRT42LL/A suitable for creative apps? — Yes. With Radeon Pro 560X graphics and the Retina display, it supports entry-level video editing, photo editing, and design workflows on macOS.
• What should I know about upgrading or expanding storage or memory? — Memory on iMac models is fixed at purchase; storage configurations are part of the original build. For precise upgrade options and compatibility, consult Apple’s official specifications for the MRT42LL/A or contact support.