All-in-One · 2010ObsoleteUncommon · 55

iMac 21.5″ (Mid 2010)

A1311 · Unibody iMac (2009-2011)

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iMac 21.5″ (Mid 2010) — reference photo — Loading photo credit…

Identifiers

Order number	A1311
Machine ID	iMac11,2

Reference

Original price	$1,199 – $1,849
Announced	2010-07-27
Discontinued	2011-05-03
Max supported OS	macOS 10.13 High Sierra
Design era	Unibody iMac (2009-2011)

Configurations

Colors	Anodized aluminum
CPU	Intel Core i3-540 @ 3.06 GHz, Intel Core i3-550 @ 3.2 GHz, Intel Core i5-680 @ 3.6 GHz
Memory	4 GB, 8 GB, 16 GB (max)
Storage	500 GB SATA HDD, 1 TB SATA HDD
Graphics	ATI Radeon HD 4670 (256 MB), ATI Radeon HD 5670 (512 MB)
Display	21.5″ LED (1920×1080)
Operating system	Mac OS X 10.6 Snow Leopard, Mac OS X 10.6.1, Mac OS X 10.6.2, Mac OS X 10.6.3, Mac OS X 10.6.4, Mac OS X 10.6.5, Mac OS X 10.6.6, Mac OS X 10.6.7, Mac OS X 10.6.8, Mac OS X 10.7 Lion, Mac OS X 10.7.1, Mac OS X 10.7.2, Mac OS X 10.7.3, Mac OS X 10.7.4, Mac OS X 10.7.5, OS X 10.8 Mountain Lion, OS X 10.8.1, OS X 10.8.2, OS X 10.8.3, OS X 10.8.4, OS X 10.8.5, OS X 10.9 Mavericks, OS X 10.9.1, OS X 10.9.2, OS X 10.9.3, OS X 10.9.4, OS X 10.9.5, OS X 10.10 Yosemite, OS X 10.10.1, OS X 10.10.2, OS X 10.10.3, OS X 10.10.4, OS X 10.10.5, OS X 10.11 El Capitan, OS X 10.11.1, OS X 10.11.2, OS X 10.11.3, OS X 10.11.4, OS X 10.11.5, OS X 10.11.6, macOS 10.12 Sierra, macOS 10.12.1, macOS 10.12.2, macOS 10.12.3, macOS 10.12.4, macOS 10.12.5, macOS 10.12.6, macOS 10.13 High Sierra, macOS 10.13.1, macOS 10.13.2, macOS 10.13.3, macOS 10.13.4, macOS 10.13.5, macOS 10.13.6
Removable media	SuperDrive (DVD±R DL, slot-loading)

Physical

Ports & connectivity	4× USB 2.0 · 1× FireWire 800 · 10/100/1000 Ethernet · 3.5mm headphone · 3.5mm audio in · Mini DisplayPort · SDXC card slot · Built-in FaceTime HD
Dimensions (W×H×D)	528 × 450 × 189 mm
Weight	9.3 kg

Known quirks

HDD temperature sensor still an Apple-specific firmware requirement
5670 GPU runs hot — common failure mode after years
Glass front has embedded iSight but often yellows
PSU rebuild is common on 10-year-old units

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Configurations

Colors

Anodized aluminum

CPU

Intel Core i3-540 @ 3.06 GHz, Intel Core i3-550 @ 3.2 GHz, Intel Core i5-680 @ 3.6 GHz

Memory

4 GB, 8 GB, 16 GB (max)

Storage

500 GB SATA HDD, 1 TB SATA HDD

Graphics

ATI Radeon HD 4670 (256 MB), ATI Radeon HD 5670 (512 MB)

Display

21.5″ LED (1920×1080)

Operating system

Mac OS X 10.6 Snow Leopard, Mac OS X 10.6.1, Mac OS X 10.6.2, Mac OS X 10.6.3, Mac OS X 10.6.4, Mac OS X 10.6.5, Mac OS X 10.6.6, Mac OS X 10.6.7, Mac OS X 10.6.8, Mac OS X 10.7 Lion, Mac OS X 10.7.1, Mac OS X 10.7.2, Mac OS X 10.7.3, Mac OS X 10.7.4, Mac OS X 10.7.5, OS X 10.8 Mountain Lion, OS X 10.8.1, OS X 10.8.2, OS X 10.8.3, OS X 10.8.4, OS X 10.8.5, OS X 10.9 Mavericks, OS X 10.9.1, OS X 10.9.2, OS X 10.9.3, OS X 10.9.4, OS X 10.9.5, OS X 10.10 Yosemite, OS X 10.10.1, OS X 10.10.2, OS X 10.10.3, OS X 10.10.4, OS X 10.10.5, OS X 10.11 El Capitan, OS X 10.11.1, OS X 10.11.2, OS X 10.11.3, OS X 10.11.4, OS X 10.11.5, OS X 10.11.6, macOS 10.12 Sierra, macOS 10.12.1, macOS 10.12.2, macOS 10.12.3, macOS 10.12.4, macOS 10.12.5, macOS 10.12.6, macOS 10.13 High Sierra, macOS 10.13.1, macOS 10.13.2, macOS 10.13.3, macOS 10.13.4, macOS 10.13.5, macOS 10.13.6

Removable media

SuperDrive (DVD±R DL, slot-loading)