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Silver aluminium all-in-one desktop with 21.5 inch Retina 4K display

Apple

Apple iMac 21.5" Retina 4K i5-8500 8GB 1TB MRT42LL/A

SKU CH-DTJN-NNGQE

A 21.5-inch Retina 4K all-in-one desktop with a 3.0 GHz Intel Core i5-8500 processor, 8GB DDR4 memory, 1TB storage and Radeon Pro 560X graphics

  • Screen size21.5 in (54.6 cm)
  • SSD storageNo
  • GraphicsNo
  • Operating systemMacOS
  • Hard driveNo
  • Touch inputNo
  • 5-inch Retina 4K display delivers 4096x2304 resolution for sharp visuals
  • 0 GHz Intel Core i5-8500 hexa-core processor handles demanding tasks smoothly
  • 8GB DDR4 RAM at 2666 MHz supports responsive multitasking
  • Radeon Pro 560X with 4GB video memory powers graphics-intensive workloads
  • Two Thunderbolt 3 ports plus four USB 3.1 Gen 2 ports connect peripherals fast

21.5-inch Retina 4K all-in-one

The 2019 Apple iMac combines a 3.0 GHz Intel Core i5-8500 six-core processor with a 4096x2304 display in a single silver chassis. It ships with 8 GB of 2666 MHz DDR4 memory and a 1 TB hard drive. The Radeon Pro 560X graphics card provides 4 GB of dedicated video memory. This configuration suits home-office users who want a tidy desk setup without separate components.

Radeon Pro 560X and Thunderbolt 3 ports

The discrete Radeon Pro 560X GPU handles creative workloads and light gaming better than integrated graphics alone. Two Thunderbolt 3 ports deliver up to 40 Gb/s bandwidth for fast external storage or high-resolution displays. Four USB 3.0 ports, Gigabit Ethernet and a 3.5 mm headphone jack complete the wired connectivity. No internal SSD is present, so boot and application launch speeds rely on the mechanical drive.

Mechanical drive and fixed memory limits

The 1 TB hard drive offers capacity but lacks the access speed of solid-state storage, which affects system responsiveness. Memory is not user-upgradable after purchase, locking the system at 8 GB for its lifespan. The 21.5-inch panel does not support touch input. Buyers who need faster storage, more than 8 GB of RAM or a touchscreen should consider alternative form factors.

How it compares

Measured against everything we stock in Tower & Compact Desktop PCs, at today’s prices. Recalculated every night.

Price $252.99
Cheaper than about 80% of the 14,711 comparable items (median $494.99).
Screen size 21.5 in (54.6 cm)
Lower than about 90% of the 2,278 comparable items (median 22 in).

Specifications

Product
Brand nameApple
Product lineAIO-APIMAC21-I5/G8-8-1 TB-ACC
Model nameMRT42LL/A-ACC
Part numberAIO-APIMAC21-I5/G8-8-1 TB-ACC
Product typeAll-in-One PC
Product colorSilver
Storage
SSD storageNo
Hard driveNo
Display
Screen size21.5 in (54.6 cm)
Touch inputNo
Graphics
GraphicsNo
In the box
Included monitorNot included
Software
Operating systemMacOS

Questions about this item

Is the 8 GB of 2666 MHz DDR4 memory user-upgradeable on the MRT42LL/A?

The 8 GB of 2666 MHz DDR4 memory is built into the computer and cannot be upgraded by the user.

What limits sustained performance on the 3.0 GHz Intel Core i5-8500 with the Radeon Pro 560X 4 GB GPU?

The all-in-one thermal design limits sustained performance when the 3.0 GHz Intel Core i5-8500 and Radeon Pro 560X 4 GB GPU share the internal cooling system.

How loud does the cooling system get when the 21.5-inch Retina 4K display and i5-8500 run all day?

The cooling fans remain quiet during light use but become audible when the 3.0 GHz i5-8500 and Radeon Pro 560X sustain heavy workloads for extended periods.

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