Apple iMac (20-inch, Early 2009) vs Apple iMac 24″ (M4)

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iMac (20-inch, Early 2009) compared with iMac 24″ (M4)

	AppleiMac (20-inch, Early 2009)	AppleiMac 24″ (M4)
Overview
Released
Released	March 2009	November 2024
Performance
Processor
Processor	Intel Core 2 Duo E8135	Apple M4
CPU cores
CPU cores	2	8 or 10
Graphics
Graphics	NVIDIA GeForce 9400M (256 MB shared DDR3)	8-core GPU or 10-core GPU
AI engine (NPU)
AI engine (NPU)	–	38 TOPS
Memory
Memory	2 GB, 4 GB or 8 GB	16 GB, 24 GB or 32 GB (better)
Storage
Storage	320 GB to 1 TB	256 GB to 2 TB (better)
CPU
CPU	2.66 GHz Intel Core 2 Duo E8135 with 6 MB shared L2 cache and 1066 MHz frontside bus; exact chip identity cross-checked with EveryMac	8-core CPU with 4 performance cores and 4 efficiency cores (two-port model), or 10-core CPU with 4 performance cores and 6 efficiency cores (four-port models)
GPU
GPU	NVIDIA GeForce 9400M with at least 256 MB DDR3 shared with system memory; available system memory varies with graphics requirements	Hardware-accelerated ray tracing
AI engine
AI engine	–	16-core Neural Engine
Memory bandwidth
Memory bandwidth	–	120GB/s
Memory type
Memory type	Two user-accessible SO-DIMM slots for 1066 MHz DDR3; 2 GB standard, factory upgrades to 4 or 8 GB	–
Storage type
Storage type	320 GB 7200 rpm Serial ATA hard drive, configurable to 640 GB or 1 TB; slot-loading 8x SuperDrive with 4x double-layer DVD burning	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	20″	24″
Resolution
Resolution	1680 × 1050	4480 × 2520 (better)
Panel
Panel	–	IPS LCD
Refresh rate
Refresh rate	–	60 Hz
Brightness
Brightness	290 nits	500 nits (better)
Display type
Display type	Glossy widescreen TFT active-matrix LCD, millions of colours; maker typical brightness 290 cd/m², contrast 800:1 and 160° horizontal/vertical viewing angle. Panel technology and refresh rate unpublished and omitted.	4.5K Retina display; actual diagonal 23.5 inches
Pixel density
Pixel density	–	218 ppi
Display features
Display features	–	1 billion colours; wide colour (P3); True Tone; nano-texture glass option on four-port models
Connections
Ports
Ports	DisplayPort, 4 × USB-A, Ethernet, headphone jack	2 × Thunderbolt 4, headphone jack
Ethernet
Ethernet	1 Gb/s	–
External displays
External displays	Up to 1	Up to 1
Wi-Fi
Wi-Fi	802.11n draft	Wi-Fi 6E
Bluetooth
Bluetooth	2.1 + EDR	5.3
Camera
Camera	iSight camera	12MP Center Stage
Back ports
Back ports	Four USB 2.0 ports on the computer, plus two on the supplied wired keyboard; one FireWire 800 port at 7 W, Mini DisplayPort output, Gigabit Ethernet, headphone/optical digital output and line-in/optical digital input. FireWire and audio input described here; no SD slot.	2 × Thunderbolt / USB 4 (two-port model) or 4 × Thunderbolt 4 (four-port models), each with Thunderbolt 4 and USB 4 (up to 40Gb/s), USB 3.1 Gen 2 (up to 10Gb/s) and DisplayPort; Gigabit Ethernet on the power adapter, standard on four-port models and optional on the two-port model
External displays
External displays	Full built-in resolution and one external display up to 2560 × 1600 simultaneously; extended desktop and mirroring, optional DVI/VGA/dual-link DVI adapters	Two-port model: one at up to 6K 60Hz; four-port models: two at up to 6K 60Hz, or one at up to 8K 60Hz
Camera
Camera	–	12MP Center Stage camera with Desk View; 1080p HD video recording; advanced image signal processor with computational video
Speakers
Speakers	Built-in stereo speakers with internal 24 W digital amplifier, microphone and support for Apple Stereo Headset microphones	High-fidelity six-speaker system with force-cancelling woofers; wide stereo sound; Spatial Audio with Dolby Atmos
Microphones
Microphones	–	Studio-quality three-mic array with high signal-to-noise ratio and directional beamforming
Keyboard and mouse
Keyboard and mouse	Apple Keyboard and Mighty Mouse; numeric-keypad keyboard, wireless keyboard or wireless Mighty Mouse available as options	Magic Keyboard (two-port model) or Magic Keyboard with Touch ID (four-port models), and Magic Mouse; Magic Trackpad or Magic Keyboard with Touch ID and Numeric Keypad available instead
Design and power
Type
Type	All-in-one	All-in-one
Weight
Weight	9.1 kg	4.42 kg (better)
Width × depth × height
Width × depth × height	485 × 189 × 469 mm	547 × 147 × 461 mm
Operating system
Operating system	macOS	macOS
Power supply
Power supply	Maximum continuous power 200 W; 100–240 V AC, 50–60 Hz single phase	143W external power adapter; power lead (2 m)
Materials
Materials	Aluminium and glass enclosure with arsenic-free display glass, BFR-free components and PVC-free internal cables	100% recycled aluminium in the stand; more than 15% recycled content overall
Colours
Colours	–	Blue, Purple, Pink, Orange, Yellow, Green, Silver
In the box
In the box	iMac, Apple Keyboard, Mighty Mouse, cleaning cloth, power cord, install/restore DVDs and documentation; Mac OS X Leopard and iLife '09	iMac, Magic Keyboard (with Touch ID on four-port models), Magic Mouse, 143W power adapter, power lead (2 m), USB-C Charge Cable, polishing cloth (nano-texture glass only)