Unleash your productivity and creativity with the Apple iMac 21.5-Inch Retina 4K (Late 2015), a sleek all-in-one desktop that combines a stunning 4K Retina display with robust performance in a razor-thin aluminum chassis. Powered by a quad-core 5th Gen Intel Core i5 processor, 8GB RAM, and a fast 256GB SSD, this iMac is ideal for professionals, students, content creators, or home users seeking vibrant visuals and reliable macOS performance for tasks like photo editing, video streaming, or office work. Its compact design and high-resolution display make it a timeless choice for modern workspaces in 2025.
Detailed Specifications and Features
Display
- Panel: 21.5-inch Retina 4K IPS display with LED backlighting.
- Resolution: 4096 x 2304 (4K), delivering over 9 million pixels for sharp, detailed imagery.
- Brightness: 500 nits, ensuring vibrant visuals in various lighting conditions.
- Color Performance: Wide color gamut (P3) supporting over 1 billion colors for true-to-life hues, ideal for photo and video editing.
- Coating: Anti-reflective coating to minimize glare and enhance viewing comfort.
- Aspect Ratio: 16:9, perfect for multimedia and productivity.
Processor
- CPU: 5th Gen Intel Core i5-5575R (quad-core, 2.8 GHz base clock, Turbo Boost up to 3.3 GHz, 4MB L3 cache).
- Performance: Handles everyday tasks like web browsing, document editing, and media playback with ease; supports light creative workloads such as iMovie or Photoshop.
- Optional Upgrades: Configurable to 5th Gen Intel Core i7 (3.3 GHz quad-core, up to 3.8 GHz Turbo) at purchase for enhanced performance in demanding apps.
Memory
- RAM: 8GB 1867 MHz LPDDR3 (onboard, non-user-upgradable post-purchase).
- Configuration: 2x 4GB modules, optimized for macOS efficiency.
- Performance: Sufficient for multitasking across office apps, browsers, and light creative tools; configurable up to 16GB at purchase for heavier workloads.
Storage
- Drive: 256GB PCIe-based SSD for rapid boot times, app launches, and file access.
- Performance: PCIe SSD offers significantly faster read/write speeds compared to traditional HDDs, ensuring snappy system responsiveness.
- Optional Configurations: Available with 1TB HDD, 1TB Fusion Drive, or up to 512GB SSD at purchase for additional capacity.
Graphics
- GPU: Integrated Intel Iris Pro Graphics 6200 (uses shared system memory).
- Capabilities: Supports smooth 4K video playback, light photo editing, and casual gaming; drives the 4K Retina display and external displays up to 3840 x 2160 via Thunderbolt.
Connectivity
- Ports:
- 2x Thunderbolt 2 (up to 20 Gbps, supports external displays and high-speed peripherals).
- 4x USB 3.0 (5 Gbps, backward compatible with USB 2.0).
- 1x Gigabit Ethernet (RJ-45, supports 10/100/1000BASE-T).
- 1x SDXC card slot (for media transfers).
- 1x 3.5mm headphone jack with headset support (mic input).
- Wireless:
- Wi-Fi: 802.11ac (dual-band, up to 1.3 Gbps, compatible with 802.11a/b/g/n).
- Bluetooth 4.0 for wireless peripherals like keyboards, mice, or headphones.
- Expansion: Supports external Thunderbolt docks for additional ports; no internal expansion slots due to all-in-one design.
Audio and Video
- Camera: FaceTime HD camera (720p) for video calls and conferencing.
- Speakers: Stereo speakers with rich, balanced sound for media playback and virtual meetings.
- Microphones: Dual microphones with noise reduction for clear voice input in FaceTime, Siri, or dictation.
- Audio Output: 3.5mm headphone jack with support for Apple iPhone headset with microphone.
Operating System
- Pre-installed: OS MOnterey
- Software Ecosystem: Seamless integration with iPhone, iPad, and Apple Watch for features like Handoff, Universal Clipboard, and Sidecar.
Design and Build
- Chassis: Ultra-thin aluminum unibody (5mm at edge, 1.4 inches at stand base).
- Dimensions: 45.0 cm (H) x 52.8 cm (W) x 17.5 cm (D with stand) (17.7 x 20.8 x 6.9 inches).
- Weight: 5.68 kg (12.5 lbs).
- Stand: Tilt-adjustable stand for ergonomic viewing angles; VESA mount compatible with optional adapter for wall/desk mounting.
- Sustainability: ENERGY STAR certified, mercury-free display, arsenic-free glass, BFR/PVC-free, recyclable aluminum enclosure.
Included Accessories
- Input Devices: Apple Magic Keyboard (wireless, Bluetooth) and Apple Magic Mouse 2 (wireless, multi-touch).
- Cables: power cord.
- Optional Upgrades: Magic Trackpad 2 available at purchase.
Power and Environmental
- Power Supply: Built-in 185W power supply, 100-240V AC, 50/60Hz.
- Energy Efficiency: ENERGY STAR 6.1 certified, EPEAT Gold rated.
- Operating Conditions: 10°C to 35°C (50°F to 95°F), 5% to 95% non-condensing humidity, altitude up to 10,000 feet.
Security
- Features: Kensington lock slot for physical security.
- Software Security: Gatekeeper, FileVault encryption, and macOS sandboxing for data protection.
