Apple iMac (24-inch, M1, 2021)
The first Apple silicon iMac: an 11.5 mm-thin, seven-colour 24-inch all-in-one with a 4.5K Retina display, the Apple M1 chip and an external 143 W power adapter. Sold as a two-port model (7-core GPU) and a four-port model (8-core GPU, Ethernet in the power adapter); memory and storage are fixed at purchase.
Memory
- Standard
- 8 GB unified memory
- Configurable to
- 16 GB unified memory (maximum)
- Type
- Unified memory in the M1 package; LPDDR4X-4266, 128-bit, 68.3 GB/s (Wikipedia, Apple M1)
- Slots
- None; memory is soldered and not upgradeable (Wikipedia)
Storage
- Standard
- 256 GB or 512 GB SSD
- Configurable to
- 512 GB, 1 TB or 2 TB SSD
- Drive bays / M.2
- None; storage is soldered and not upgradeable (Wikipedia)
- Model differences
- Wikipedia notes the four-port models had higher configurable storage options than the two-port models
Graphics
- GPU
- Apple M1 integrated GPU: 7-core (two-port model) or 8-core (four-port model)
- Built-in display
- Full native resolution at 1 billion colours, simultaneously with one external display
- External displays
- One, up to 6K at 60 Hz, over Thunderbolt / USB 4
- Video output
- Thunderbolt 3 digital video and native DisplayPort over USB-C; VGA, HDMI, DVI and Thunderbolt 2 via adapters (sold separately)
Expansion
- Internal slots
- None
- External
- Two Thunderbolt / USB 4 ports (up to 40 Gb/s) for docks, storage and one display
Networking
- Wi-Fi
- Wi-Fi 6 (802.11ax), IEEE 802.11a/b/g/n/ac compatible
- Bluetooth
- Bluetooth 5.0
- Ethernet
- Gigabit Ethernet (RJ-45) built into the power adapter: standard on the four-port model, a configure-to-order option on the two-port model
Power
- Power supply
- External 143 W power adapter; 2 m colour-matched woven cable with a power connector that attaches magnetically and passes through the hole in the stand
- Input
- 100–240 V AC, 50–60 Hz, single phase
- Measured draw (Apple)
- 7-core GPU / 16 GB / 1 TB: 43 W idle, 80 W CPU max (147 / 274 BTU/h). 8-core GPU / 16 GB / 2 TB: 43 W idle, 84 W CPU max (147 / 286 BTU/h)
- ENERGY STAR test modes (115 V)
- Off 0.29 W, sleep 0.58 W, idle display-on 22.1 W; adapter no-load 0.10 W; adapter efficiency 91.5 % (Environmental Report)
- Efficiency
- ENERGY STAR certified; 54 % less energy than the ENERGY STAR requirement (Environmental Report)
Ports
- Thunderbolt / USB 4
- 2 × USB-C: Thunderbolt 3 (up to 40 Gb/s), USB 4 (up to 40 Gb/s), USB 3.1 Gen 2 (up to 10 Gb/s), DisplayPort; Thunderbolt 2, HDMI, DVI and VGA via adapters
- USB 3
- 2 × USB-C, up to 10 Gb/s (four-port model only)
- Audio
- 3.5 mm headphone jack on the left edge
- Ethernet
- Gigabit Ethernet on the power adapter (four-port standard, two-port optional)
- Layout (rear)
- USB-C ports along the lower left of the back (on the four-port model the two USB 3 ports sit left of the two Thunderbolt ports), power connector behind the stand, power button at the lower right
- Input devices
- Magic Keyboard and Magic Mouse included (Magic Keyboard with Touch ID standard on the 8-core GPU model, optional on the 7-core); Magic Keyboard with Touch ID and Numeric Keypad and Magic Trackpad configurable
Display
- Panel
- 24-inch 4.5K Retina display (actual diagonal 23.5 in)
- Resolution
- 4480 × 2520 at 218 ppi, 1 billion colours
- Brightness
- 500 nits
- Colour
- Wide colour (P3), True Tone
- Coating
- Anti-reflective coating (Apple Newsroom)
- Camera
- 1080p FaceTime HD camera using the M1 image signal processor
- Speakers
- Six-speaker system with force-cancelling woofers; spatial audio with Dolby Atmos
- Microphones
- Studio-quality three-mic array with directional beamforming
Physical
- Dimensions
- Height 46.1 cm (18.1 in), width 54.7 cm (21.5 in), stand depth 14.7 cm (5.8 in)
- Thickness
- 11.5 mm (Apple Newsroom)
- Weight
- Two-port 4.46 kg (9.83 lb); four-port 4.48 kg (9.88 lb)
- Colours
- Two-port: silver, pink, blue, green. Four-port: also purple, orange, yellow
- Stand / mounting
- Tilting stand, no height adjustment; a version with a built-in VESA mount adapter was a configure-at-purchase option (Apple, Wikipedia)
- Operating temperature
- 10–35 °C (50–95 °F)
- Relative humidity
- 5–90 % non-condensing
- Altitude
- Tested up to 5,000 m
- Acoustics
- Idle and wireless web: 1.7 B sound power, 7 dB sound pressure at the operator position
- In the box
- iMac, Magic Keyboard, Magic Mouse, 143 W power adapter, 2 m power cord, USB-C to Lightning cable
Management
- Model identifier
- iMac21,1 (four ports); iMac21,2 (two ports)
- Part numbers
- Four-port: MGPC3, MGPD3, MGPF3, MGPG3, MGPH3, MGPJ3, MGPK3, MGPL3, MGPM3, MGPN3, MGPP3, MGPQ3, MGPR3, MGPT3; two-port: MGTF3, MJV83, MJV93, MJVA3 (xx/A)
- Touch ID
- Touch ID on the Magic Keyboard talks to the Secure Enclave in M1 over an encrypted channel (Apple Newsroom)
Operating systems
- Shipped with
- macOS Big Sur (Apple Newsroom)
- Newest compatible
- macOS 27 Golden Gate (Apple)
Processors
- Apple M1 (8-core CPU)