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

Apple

Apple iMac 21.5" Retina 4K (2019) MRT32LL/A 3.6GHz Core i3 8GB 1TB HDD desktop PC

SKU CH-RP91-D3Z70

A 21.5-inch Retina 4K all-in-one desktop with a 3.6 GHz quad-core Intel Core i3, 8 GB DDR4 RAM, 1 TB HDD and macOS Ventura

  • RAM capacity8 GB
  • Form factorAll-in-One
  • Operating systemMacOS Ventura
  • Hard drive1 TB
  • Overall dimensions17.72 (H) × 20.79 (W) × 6.89 (D) in
  • Product typeBusiness Desktops & Workstations
  • Crisp 21.5" Retina 4K display for detailed visuals
  • 6 GHz quad-core Intel Core i3 handles everyday tasks
  • 8 GB DDR4 RAM supports smooth multitasking
  • 1 TB HDD stores large media libraries
  • macOS Ventura delivers a secure, up-to-date experience

All-in-One for home and study

The 21.5-inch Retina 4K iMac combines the display, computer and speakers in a single unit. It runs macOS Ventura on an Intel Core i3 3.6 GHz quad-core processor with 8 GB DDR4 RAM and a 1 TB HDD. The design suits home offices, students and general creative work.

Upgrading from older Macs or basic PCs

Replacing a pre-Retina iMac or an entry-level Windows all-in-one brings a much sharper 4K panel and the modern macOS Ventura environment. The jump is worth it when you need accurate colour for photos or a cleaner desk without a separate tower and monitor.

Buyers who want a simple Mac desktop

This model fits users who prefer macOS for web browsing, office apps, light photo editing and media playback. It is not for buyers who want more storage speed than a hard drive provides, builders who need a second card, or anyone requiring user-upgradeable memory.

How it compares

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

Price $494.99
Typical for this category: the median of 14,711 items is $494.99.
RAM capacity 8 GB
Lower than about 80% of the 13,125 comparable items (median 16 GB).

Specifications

Product
Brand nameApple
Product lineApple iMac 21.5 in Retina 4K (2019) — MRT32LL/A
Model nameApple iMac 21.5 in Retina 4K
Part numberMRT32LL/A
Product typeBusiness Desktops & Workstations
Memory
RAM capacity8 GB
Storage
Hard drive1 TB
Size & build
Form factorAll-in-One
Overall dimensions17.72 (H) × 20.79 (W) × 6.89 (D) in
Software
Operating systemMacOS Ventura

Questions about this item

What are the exact dimensions of the 21.5 inch iMac so I can check desk clearance?

The all-in-one measures 17.72 inches high, 20.79 inches wide and 6.89 inches deep.

How is the memory upgraded on this model and what mistake do installers make?

The 8 GB DDR4 SO-DIMM slots are behind a hatch on the rear; the common error is forgetting to press each module firmly until the side clips click.

When will the internal 1 TB hard drive likely need replacement?

A mechanical 1 TB HDD typically shows wear after three to five years of daily use; plan to swap it for an SSD when boot times lengthen.

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