Apple iMac (21.5-inch, Late 2015) vs Apple Mac mini (M4 or M4 Pro)

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iMac (21.5-inch, Late 2015) compared with Mac mini (M4 or M4 Pro)

	AppleiMac (21.5-inch, Late 2015)	AppleMac mini (M4 or M4 Pro)
Overview
Released
Released	October 2015	November 2024
Performance
Processor
Processor	Intel Core i5-5250U or Intel Core i5-5575R	Apple M4 or Apple M4 Pro
CPU cores
CPU cores	2 or 4	10, 12 or 14
Graphics
Graphics	Intel HD Graphics 6000 or Intel Iris Pro Graphics 6200	10-core GPU, 16-core GPU or 20-core GPU
AI engine (NPU)
AI engine (NPU)	–	38 TOPS
Memory
Memory	8 GB or 16 GB	16 GB, 24 GB, 32 GB or 64 GB (better)
Storage
Storage	256 GB to 2 TB	256 GB to 8 TB (better)
CPU
CPU	1.6 GHz dual-core Core i5 with Turbo Boost up to 2.7 GHz or 2.8 GHz quad-core Core i5 with Turbo Boost up to 3.3 GHz; Geekbench identifies the processors as Core i5-5250U and Core i5-5575R, respectively	M4: 10-core CPU with 4 performance cores and 6 efficiency cores; M4 Pro: 12-core CPU with 8 performance cores and 4 efficiency cores, or 14-core CPU with 10 performance cores and 4 efficiency cores
GPU
GPU	Intel HD Graphics 6000 in the 1.6 GHz model and Intel Iris Pro Graphics 6200 in the 2.8 GHz model; no discrete graphics option	M4: 10-core GPU; M4 Pro: 16-core or 20-core GPU; hardware-accelerated ray tracing
AI engine
AI engine	–	16-core Neural Engine
Memory bandwidth
Memory bandwidth	–	M4: 120GB/s; M4 Pro: 273GB/s
Memory type
Memory type	8 GB of 1867 MHz LPDDR3 onboard memory, configurable to 16 GB; soldered memory cannot be upgraded after purchase (Expert Reviews and Alphr)	–
Storage type
Storage type	1 TB 5400-rpm hard drive on both models; the 1.6 GHz model can have a 1 TB Fusion Drive or 256 GB SSD, and the 2.8 GHz model can have a 1 TB or 2 TB Fusion Drive or 256 GB SSD. Apple specifies 24 GB of flash for the 1 TB Fusion Drive and 128 GB for the 2 TB Fusion Drive.	SSD
Media engine
Media engine	–	Hardware-accelerated H.264, HEVC, ProRes and ProRes RAW; video decode engine; video encode engine; ProRes encode and decode engine; AV1 decode
Display
Screen size
Screen size	21.5″	None built in
Resolution
Resolution	1920 × 1080	–
Panel
Panel	IPS LCD	–
Display type
Display type	21.5-inch LED-backlit display with IPS technology; 1920 × 1080 with support for millions of colours. This is the non-Retina model.	–
Connections
Ports
Ports	2 × Thunderbolt 2, 4 × USB-A, SD card slot, Ethernet, headphone jack	3 × Thunderbolt 4, 2 × USB-C, HDMI, Ethernet, headphone jack
Ethernet
Ethernet	1 Gb/s	1 Gb/s
External displays
External displays	Up to 1	Up to 3 (better)
Wi-Fi
Wi-Fi	802.11ac	Wi-Fi 6E
Bluetooth
Bluetooth	4.0	5.3
Front ports
Front ports	–	2 × USB-C with USB 3 (up to 10Gb/s); 3.5 mm headphone jack with advanced support for high-impedance headphones
Camera
Camera	FaceTime HD	–
Back ports
Back ports	Four USB 3 ports, two Thunderbolt 2 ports with Mini DisplayPort output, SDXC card slot, Gigabit Ethernet, headphone and optical digital audio output; Kensington lock slot. HDMI, DVI, VGA and dual-link DVI need separately sold adapters.	M4: 3 × Thunderbolt 4 (USB-C) with Thunderbolt 4 and USB 4 (up to 40Gb/s) and DisplayPort; M4 Pro: 3 × Thunderbolt 5 (USB-C) with Thunderbolt 5 (up to 120Gb/s), USB 4 and DisplayPort; HDMI with multichannel audio output; Gigabit Ethernet (RJ-45), configurable to 10Gb Ethernet
External displays
External displays	Built-in display at native resolution alongside one external display up to 3840 × 2160 on the 1.6 GHz model or 4096 × 2304 on the 2.8 GHz model; extended desktop and video mirroring	M4: up to three (two at up to 6K 60Hz over Thunderbolt, plus one at up to 5K 60Hz over Thunderbolt or 4K 60Hz over HDMI), or two (one at up to 5K 60Hz plus one at up to 8K 60Hz or 4K 240Hz); M4 Pro: up to three at up to 6K 60Hz over Thunderbolt or HDMI, or two (one at up to 6K 60Hz plus one at up to 8K 60Hz or 4K 240Hz)
Speakers
Speakers	Stereo speakers; supports Apple iPhone headset with microphone	Built-in speaker
Microphones
Microphones	Dual microphones	None built in
Keyboard and mouse
Keyboard and mouse	Magic Keyboard, Magic Mouse 2 and Lightning to USB cable; optional Magic Trackpad 2	–
Design and power
Type
Type	All-in-one	Compact
Weight
Weight	5.68 kg	0.67 kg (better)
Width × depth × height
Width × depth × height	528 × 175 × 450 mm	127 × 127 × 50 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Dimensions include the stand; weight varies by configuration and manufacturing process. A built-in VESA mount version was available, but its listed height in inches conflicts with the metric value and is omitted.	–
Power supply
Power supply	100–240 V AC, 50–60 Hz, single phase	Built-in; 100–240V AC; 155W maximum continuous power
Power use
Power use	–	M4 with 16GB and 256GB: 4W idle, 65W maximum; M4 Pro with 64GB and 8TB: 5W idle, 140W maximum
Noise
Noise	Apple reports operator-position sound pressure of 11.5 dB at idle and during wireless web, and 12 dB during hard-drive seek, tested on the 1.6 GHz Core i5 with 8 GB memory and 1 TB hard drive	5 dBA sound pressure at idle (operator position)
Colours
Colours	–	Silver
Materials
Materials	Recyclable aluminium enclosure; arsenic-free display glass and mercury-free LED backlight; speaker enclosures contain 35 percent post-consumer recycled plastic	–
In the box
In the box	iMac, Magic Keyboard, Magic Mouse 2, Lightning to USB cable and power lead; OS X El Capitan at launch. The support sheet's macOS Sierra wording reflects a later software update.	Mac mini, power lead (1.8 m)