The Apple iMac19,1 MRQY2LL/A is the 27-inch Retina 5K iMac (Early 2019 to 2020), released on March 19, 2019 and discontinued in Late 2020.

It features a stunning all-in-one aluminum design with a very thin edge profile (tapering to about 5 mm). 

Key Specifications

• Display: 27-inch (diagonal) Retina 5K IPS display — 5120 × 2880 resolution at 218 ppi, 500 nits brightness, wide color (P3) gamut, and support for one billion colors. It’s an excellent screen for photo/video editing, productivity, and media consumption.
• Processor: 3.0 GHz 6-core 8th-generation Intel Core i5-8500 (Coffee Lake, 14 nm) with Turbo Boost up to 4.1 GHz, 9 MB L3 cache. It has 6 cores / 6 threads.
• Graphics: AMD Radeon Pro 570X with 4 GB of GDDR5 memory (some configs had 575X or 580X). Decent for 4K/5K video editing, light 3D work, and everyday tasks, but not a high-end gaming GPU.
• Memory: 16 GB of 2666 MHz DDR4 SDRAM. It has four user-accessible SO-DIMM slots (upgradable to 32 GB, or even 64 GB).
• Storage: 1TB/32GB Fusion Drive (a hybrid of a fast SSD cache + traditional hard drive for capacity). You can upgrade/replace it, though it requires opening the display.
• Connectivity:
  • 4 × USB-A ports
  • 2 × Thunderbolt 3 (USB-C) ports
  • Gigabit Ethernet
  • SDXC card slot
  • 3.5 mm headphone jack
• Other: 1080p FaceTime HD camera, stereo speakers, dual microphones, 802.11ac Wi-Fi, Bluetooth 4.2.
• Dimensions & Weight: Approximately 25.6" × 20.3" × 8" (height × width × depth with stand); ~21 lbs (9.5 kg).