iMac (Intel-based)

iMac (Intel based)
iMac (Intel based)
Developer	Apple Inc.
Type	Desktop
Release date	October 13, 2015 (current model) January 10, 2006 (original release)
CPU	Intel Core i5, Intel Core i7 (current model) Intel Core Duo (original release)
Related articles	Mac Mini, Mac Pro

The iMac is a series of Macintosh desktop computers offered by Apple Inc. The current Apple iMac features either an Intel Core i5 or Core i7 processor, Intel Iris, Nvidia GeForce 700 Series, or AMD Radeon R9 M200 Series graphics cards, and a choice of either a 21.5" or 27" LED-LCD display.

Previous iMac models featured either a white polycarbonate enclosure or an aluminium enclosure. The late 2009 iMac model featured a unibody aluminium enclosure, a version of which can still be seen on the current model. The current iMacs released in October 2012 also feature a much thinner display, with the edge measuring just 5 mm.^[1]

History

At the Macworld Conference and Expo on January 10, 2006, Steve Jobs announced that the new iMac would be the first Macintosh to use an Intel CPU, the Core Duo. The introduction of the new iMac along with the Intel-based MacBook Pro signaled the start of a six-month transition from PowerPC to Intel processors.

The features, price, and case design remained unchanged from the iMac G5. The processor speed, however, according to tests run by Apple using SPEC,^[2] was declared to be two to three times faster than the iMac G5.

Polycarbonate iMac

17-inch polycarbonate iMac

Alongside the MacBook Pro, the iMac Core Duo represents Apple's first computer to feature Intel processors instead of PowerPC processors, a transition that completed in November 2006. Since the introduction of the iMac Core Duo, other lines have followed, including the introduction of the Intel Core-powered Mac mini on February 28, 2006, the MacBook consumer line of laptop computers on May 16, 2006, the Mac Pro on August 7, 2006, and the Xserve in November 2006, completing the Macintosh family transition to Intel processors.

In early February 2006, Apple confirmed reports of video display problems on the new Intel-based iMacs. When playing video on Apple's Front Row media browser, some 20-inch iMacs (those built-to-order with upgraded video cards) showed random horizontal lines, ghosting, video tearing and other problems. The problem was fixed with a software update.

In late 2006, Apple introduced a new version of the iMac which included a Core 2 Duo chip and a lower price. Apple added a new 24-inch model with IPS-display and a resolution of 1920 × 1200 (WUXGA), making it the first iMac to be able to display 1080p content in its full resolution, and a VESA Flat Display Mounting Interface. Except for the 17-inch 1.83 GHz processor model, this version also included an 802.11n draft card.^[3]

Specifications of polycarbonate iMacs from 2006 through 2007
Processor model	Intel Core Duo			Intel Core 2 Duo
Model	Early 2006^[4]		Mid 2006^[5]	Late 2006^[6]
Marketing Model No.^[7]	MA199xx/A	MA200xx/A	MA406xx/A	MA710xx/A	MA590xx/A	MA589xx/A	MA456xx/A
Model Identifier	iMac4,1		iMac4,2	iMac5,2	iMac5,1		iMac6,1
EMC No.	2104	2105	2110	2124	2114	2118	2111
Enclosure	White polycarbonate
Display	17", 1440 × 900	20", 1680 × 1050	17", 1440 × 900			20", 1680 × 1050	24", 1920 × 1200 IPS
							LG Phillips, LM240WU2-SLA1
	widescreen 16:10, matte display
Processor	1.83 GHz (T2400)			1.83 GHz (T5600)	2.0 GHz (T7200)	2.16 GHz (T7400)
	2 MB on-chip L2 cache				4 MB on-chip L2 cache
	Optional: 2.0 GHz (T2500)				Optional: 2.16 GHz (T7400)	Optional: 2.33 GHz (T7600)
System bus	667 MHz front side bus
Memory	667 MHz PC2-5300 DDR2 SO-DIMM SDRAM
Memory	512 MB (early 2006, one 512 MB/Mid 2006, two 256 MB) Optional: 2 GB				512 MB (two 256 MB) or 1 GB (two 512 MB) Optional: 3 GB
Graphics	ATI Radeon X1600 with 128 MB of GDDR3 SDRAM		Intel GMA 950 with 64 MB shared memory		ATI Radeon X1600 with 128 MB of GDDR3 SDRAM		nVidia GeForce 7300GT with 128 MB of GDDR3 SDRAM
Graphics		Optional: 256 MB			Optional: 256 MB		Optional: 7600GT with 256 MB
Hard drive	160 GB Optional: 250 GB	250 GB Optional: 500 GB	160 GB Optional: 250 GB	160 GB	160 GB Optional: 250 GB or 500 GB	250 GB Optional: 500 GB
Hard drive	Serial ATA 7200-rpm
Optical drive	Slot-loading 8× SuperDrive with 2.4× DL recording (DVD+R DL/DVD±RW/CD-RW)		24× combo drive (DVD-ROM/CD-RW)		SuperDrive
Connectivity	Internal AirPort Extreme 802.11a/b/g Gigabit Ethernet Built-in infrared (IR) receiver for Apple Remote Bluetooth 2.0 + EDR (except Late 2006 1.83 Ghz)				Internal Airport Extreme 802.11a/b/g (draft-n disabled by default) Gigabit Ethernet Built-in infrared (IR) receiver for Apple Remote Bluetooth 2.0 + EDR
Camera	iSight Camera (640 × 480 0.3 MP)
Video out	Mini-DVI
Peripherals	3x USB 2.0 2x Firewire 400 Headphone/digital audio output Audio line-in			3x USB 2.0 2x Firewire 400 Headphone/digital audio output Audio line-in/digital audio input			3x USB 2.0 1x Firewire 400 1x Firewire 800 Headphone/digital audio output Audio line-in/digital audio input
Maximum operating system	OS X 10.6 "Snow Leopard"			OS X 10.7 "Lion" if 2 GB of RAM is installed, OS X 10.6 otherwise

Aluminum iMac

20" Aluminum iMac

In August 2007, Apple introduced a complete redesign of the iMac, featuring an aluminum, glass and plastic enclosure. There is only one visible screw on the entire computer, located at the base of the iMac for accessing the memory slots. The back is no longer removable and is now a continuation of the aluminum body from the front and sides. The 17-inch model was completely removed from the lineup.

In March 2009, Apple released a minor refresh of the iMac line. Changes included a fourth USB port, removal of the FireWire 400 port, and a slightly redesigned base. The exterior design was almost identical to the older Intel-based iMacs. The models were one 20-inch configuration and three 24-inch configurations (instead of two at each screen size as before).^[8]

Apple doubled the default RAM and hard-disk size on all models, moving the RAM to the DDR3 specification. This revision also introduced a new, smaller, and more compact Apple Keyboard that excluded the numeric keypad and forward delete key in favor of the fn + Delete keys shortcut by default.^[8] Users could, however, replace this version with a more traditional, full-size model with a numeric keypad by requesting Apple to build their machine to order through its online store.

Specifications of aluminium iMacs from 2007 through 2009
Component	Intel Core 2 Duo
Model	Mid 2007^[9]		Early 2008^[10]		Early 2009^[11]
Enclosure	Aluminum, glass and plastic
Marketing Model No.^[12]	MA876XX/A MA877XX/A MB199XX/A MB200XX/A	MA878XX/A MB201XX/A MB322XX/A	MB323XX/A MB324XX/A MB388XX/A MB391XX/A	MB325XX/A MB393XX/A MB398XX/A	MB417XX/A MC019XX/A	MB418XX/A MB419XX/A MB420XX/A MC020XX/A MC021XX/A MC022XX/A
Model identifier	iMac7,1		iMac8,1		iMac9,1
Display	20", 1680 × 1050	24", 1920 × 1200 IPS	20", 1680 × 1050	24", 1920 × 1200 IPS	20", 1680 × 1050	24", 1920 × 1200 IPS
Display	glossy glass-covered widescreen 16:10
Processor	2.0 GHz (T7300) Intel Core 2 Duo with 4 MB on-chip L2 cache	2.4 GHz (T7700) with 4 MB on-chip L2 cache	2.4 GHz (E8135) Intel Core 2 Duo with 6 MB on-chip L2 cache	2.8 GHz (E8235) with 6 MB on-chip L2 cache	2.66 GHz (E8135) Intel Core 2 Duo with 6 MB on-chip L2 cache	2.66 GHz (E8135) Intel Core 2 Duo with 6 MB on-chip L2 cache or 2.93 GHz (E8335) with 6 MB on-chip L2 cache
Processor	Optional: 2.4 GHz (T7700)	Optional: 2.8 GHz (X7900) Core 2 Extreme	Optional: 2.66 GHz (E8335)	Optional: 3.06 GHz (E8435)	Optional: 2.93 GHz (E8335)	Optional: 3.06 GHz (E8435)
System bus	800 MHz front side bus		1066 MHz front side bus
Memory	1 GB (two 512 MB) or 2 GB (two 1 GB) Optional: 6 GB (4 GB Officially)		1 GB (two 512 MB) or 2 GB (two 1 GB) Optional: 6 GB (4 GB Officially)		2 GB (two 1 GB) or 4 GB (two 2 GB) Optional: 8 GB
Memory	SODIMM DDR2 SDRAM-667		SODIMM DDR2 SDRAM-800		SODIMM DDR3 SDRAM-1066
Graphics	ATI Radeon HD 2400 XT with 128 MB of GDDR3 SDRAM	ATI Radeon HD 2600 PRO with 256 MB of GDDR3 SDRAM	ATI Radeon HD 2400 XT with 128 MB of GDDR3 SDRAM	ATI Radeon HD 2600 PRO with 256 MB of GDDR3 SDRAM	nVidia GeForce 9400M with 256 MB shared memory	nVidia GeForce GT 120 with 256 MB of GDDR3 SDRAM
Graphics	Optional: 2600 PRO with 256 MB		Optional: 2600 PRO with 256 MB	Optional: nVidia 8800 GS with 512 MB	Optional: GT 130 or ATI Radeon HD 4850, both with 512 MB of GDDR3 SDRAM
Hard drive	250 GB Optional: 320 GB, 500 GB, 750 GB or 1 TB	320 GB Optional: 500 GB, 750 GB or 1 TB	250 GB Optional: 320 GB, 500 GB, 750 GB or 1 TB	320 GB Optional: 500 GB, 750 GB or 1 TB	320 GB Optional: 640 GB or 1 TB	640 GB Optional: 1 TB
Hard drive	Serial ATA 7200 rpm
Optical drive	8x double-layer SuperDrive (DVD±R DL/DVD±RW/CD-RW)
Connectivity	Internal AirPort Extreme 802.11a/b/g/n (draft-n enabled) Gigabit Ethernet Built-in infrared (IR) receiver for Apple Remote Bluetooth 2.0 + EDR		Internal AirPort Extreme (802.11n) 802.11a/b/g/n (draft-n enabled) Gigabit Ethernet Built-in infrared (IR) receiver for Apple Remote Bluetooth 2.1 + EDR
Camera	iSight Camera (640 x 480 0.3 MP)
Video out	Mini-DVI				Mini DisplayPort
Peripherals	3x USB 2.0 1x FireWire 400 1x FireWire 800 Headphone/digital audio output Audio line-in/digital audio input				4x USB 2.0 1x Firewire 800 Headphone/digital audio output Audio line-in/digital audio input
Maximum operating system	OS X El Capitan if 2 GB RAM is installed, OS X Snow Leopard otherwise				OS X El Capitan

Unibody iMac

27" Unibody iMac

In October 2009, a 16:9 aspect ratio screen was introduced in 21.5" and 27" models, replacing the 20" and 24" 16:10 aspect ratio screens of the previous generation. Video card options entirely switched to AMD, save for the standard onboard Nvidia card in the base model. The iMac's processor selection saw a significant increase.

Default RAM has also been increased across the iMac range. With the advent of the larger screens, Apple doubled the number of memory slots from two to four. Consequently, the maximum memory capacity was also doubled (to 16 GB), and for Intel Core i-series (27-inch), quadrupled, to 32 GB.

Specifications of Unibody iMacs from 2009 through 2011
Component	Intel Core 2 Duo, Core i5, and Core i7				Intel Core i3, Core i5, and Core i7				Core i5, and Core i7
Model	Late 2009^[13]				Mid 2010^[14]				Mid 2011^[15]
Release date	October 20, 2009				July 27, 2010				May 3, 2011
Marketing Model Number	MB950xx/A	MC413xx/A	MB952xx/A	MB953xx/A	MC508xx/A	MC509xx/A	MC510xx/A	MC511xx/A	MC309xx/A	MC812xx/A	MC813xx/A	MC814xx/A
Model Number	A1311		A1312		A1311		A1312		A1311		A1312
EMC Number	2308		2309	2374	2389		2390		2428		2429
Model ID	iMac10,1			iMac11,1	iMac11,2		iMac11,3		iMac12,1		iMac12,2
Enclosure	Aluminum and glass
Display	21.5", 1920 × 1080		27", 2560 × 1440		21.5", 1920 × 1080		27", 2560 × 1440		21.5", 1920 × 1080		27", 2560 × 1440
Display	glossy glass-covered widescreen 16:9, LED backlighting and IPS technology
Processor	3.06 GHz (E7600) Intel Core 2 Duo with 3 MB on-chip L2 cache			2.66 GHz i5 (750) with 8 MB on-chip L3 cache	3.06 GHz i3 (540) with 4 MB on-chip L3 cache	3.2 GHz i3 (550) with 4 MB on-chip L3 cache		2.8 GHz i5 (760) with 8 MB on-chip L3 cache	2.5 GHz i5 (2400S) with 6 MB on-chip L3 cache	2.7 GHz i5 (2500S) with 6 MB on-chip L3 cache		3.1 GHz i5 (2400) with 6 MB on-chip L3 cache
Processor	Optional: 3.33 GHz (E8600) Core 2 Duo with 6 MB on-chip L2 cache			Optional: 2.8 GHz i7 (860)	Optional: 3.2 GHz i3 (550) or 3.6 GHz i5 (680)		Optional: 3.6 GHz i5 (680)	Optional: 2.93 GHz i7 (870)		Optional: 2.8 GHz i7 (2600S)		Optional: 3.4 GHz i7 (2600)
System bus
	Front Side Bus			Intel Direct Media Interface
	1066 MHz Optional: 1333 MHz with 3.33 GHz Core 2 Duo option			2.5 GT/s
Memory	4 GB (two 2 GB, two slots empty) Optional: 16 GB			4 GB (two 2 GB, two slots empty) Expandable to 32 GB^[16] (16 GB supported by Apple)
Memory	1066 MHz PC3-8500 DDR3 SO-DIMM SDRAM			1066 MHz PC3-8500 DDR3 SO-DIMM SDRAM (Upgradable to 1333 MHz PC3-10600 DDR3 SO-DIMM SDRAM)	1333 MHz PC3-10600 DDR3 SO-DIMM SDRAM
Graphics	nVidia GeForce 9400M with 256 MB shared memory	ATI Radeon HD 4670 with 256 MB of GDDR3 SDRAM		ATI Radeon HD 4850 with 512 MB of GDDR3 SDRAM	ATI Radeon HD 4670 with 256 MB of GDDR3 SDRAM	ATI Radeon HD 5670 with 512 MB of GDDR3 SDRAM		ATI Radeon HD 5750 with 1 GB of GDDR5 SDRAM	AMD Radeon HD 6750M with 512 MB of GDDR5 SDRAM	AMD Radeon HD 6770M with 512 MB of GDDR5 SDRAM		AMD Radeon HD 6970M with 1 GB of GDDR5 SDRAM Optional: with 2 GB GDDR5 SDRAM
Hard drive	500 GB Optional: 1 TB or 2 TB		1 TB Optional: 2 TB		500 GB Optional: 1 TB or 2 TB	1 TB Optional: 2 TB	1 TB Optional: 2 TB and/or 256 GB SSD		500 GB	1 TB Optional: 2 TB and/or 256 GB SSD
Hard drive	Serial ATA 7200 rpm
Optical drive	8x double-layer SuperDrive (DVD±R DL/DVD±RW/CD-RW)
Connectivity	Internal AirPort Extreme 802.11a/b/g/n Gigabit Ethernet Built-in infrared (IR) receiver for Apple Remote Bluetooth 2.1 + EDR
Peripherals	4x USB 2.0 1x Firewire 800 SD Card slot Headphone/digital audio output Audio line-in/digital audio input Mini DisplayPort Mini DisplayPort to VGA, DVI, HDMI and DisplayPort adapters available				4x USB 2.0 1x Firewire 800 SDXC Card slot Headphone/digital audio output Audio line-in/digital audio input Mini DisplayPort Mini DisplayPort to VGA, DVI, HDMI and DisplayPort adapters available				4x USB 2.0 1x Firewire 800 SDXC Card slot Headphone/digital audio output Audio line-in/digital audio input 1x Thunderbolt port (21.5") 2x Thunderbolt ports (27") Mini DisplayPort to VGA, DVI, HDMI and DisplayPort adapters available
Camera	iSight Camera (640 x 480 0.3 MP)								FaceTime HD camera 720p (1280 x 720 0.9 MP)
Maximum operating system	OS X El Capitan

Slim Unibody iMac

Side view of the Slim Unibody iMac

In October 2012, a new iMac model was introduced that featured a considerably smaller body depth than the previous models, measuring 5mm at its thinnest point. This was partly achieved by using a process called Full lamination. The display and glass are laminated together eliminating a 2 mm gap between them. The 21.5 in and 27 in screens remained at their previous resolutions, 1920×1080 and 2560×1440 respectively.

As with the 2009 model, memory has been upgraded; the standard specification is now 8 GB, with the 21.5 in model supporting up to 16 GB and the 27 in model supporting up to 32 GB. It was reported that the 21.5 in iMac would have non-replaceable soldered memory similar to the MacBook Air and Retina display MacBook Pro^[17] though tear-downs show that it uses removable memory but accessing the modules requires ungluing the screen and removing the logic board.^[18] The 27 in version features an access port to upgrade memory without disassembling the display.^[19] Apple also upgraded the computers' processors, using Intel's Ivy Bridge microarchitecture-based Core i5 and Core i7 microprocessors.

Video cards are now Nvidia as standard. USB 3.0 ports are now included for the first time. The 2012 iMac also features the option of a Fusion Drive which combines an SSD and a conventional HDD to create more efficient and faster storage. Apple also removed the built-in optical drive starting with this iMac generation.

On March 5, 2013, Apple quietly announced an education-only version of the iMac, with less powerful specs for a cheaper price. It includes a 3.3 GHz dual-core Intel i3 processor, 4 GB of memory, a 500 GB hard drive and Intel HD Graphics 4000, retailing for US$1099, $200 cheaper than the base-level consumer iMac.^[20]

On September 24, 2013, the 2012 iMac model was updated with 4th-generation Intel Haswell processors and Nvidia 7xx series GPU, promising up to 1.4x improvements in performance. It also has 802.11ac Wi-Fi, which is capable of reaching speeds up to 1300 Mbit/s and PCIe-based flash storage, offering up to 1.5x the performance of previous-generation (Ivy Bridge) iMacs. This applies to both the Fusion Drive and pure-SSD options.

Specifications of Slim Unibody iMacs from 2012
Model	Late 2012^[21]				Early 2013 (education only)	Late 2013				Mid 2014	Late 2015
Release date	November 30, 2012		January 2013^[22]		March 5, 2013	September 24, 2013				June 18, 2014	October 13, 2015
Part Number^[23]	MD093XX/A	MD094XX/A	MD095XX/A	MD096XX/A	MD699XX/A	ME086XX/A	ME087XX/A	ME088XX/A	ME089XX/A	MF883XX/A, MG022XX/A	MK142XX/A	MK442XX/A
Model Number	A1418		A1419		A1418	A1418		A1419		A1418
EMC Number	2544		2546		2544	2638		2639		2805 ^[24]
Model ID^[25]	iMac13,1		iMac13,2		iMac13,1	iMac14,1		iMac14,2		iMac14,4	iMac16,1
Enclosure	Aluminum and glass
Display	21.5 in; 1920 × 1080		27 in; 2560 × 1440		21.5 in; 1920 × 1080	21.5 in; 1920 × 1080		27 in; 2560 × 1440		21.5 in; 1920 × 1080	21.5 in; 1920 × 1080
Display	Glossy glass-covered widescreen 16:9, LED backlighting and IPS technology
Processor	2.7 GHz (i5-3335S) Intel Core i5 with 6 MB on-chip L3 cache	2.9 GHz (i5-3470S) Intel Core i5 with 6 MB on-chip L3 cache		3.2 GHz (i5-3470) Intel Core i5 with 6 MB on-chip L3 cache	3.3 GHz (i3-3225) Intel Core i3 with 3 MB on-chip L3 cache	2.7 GHz (i5-4570R) Intel Core i5 with 4 MB on-chip L3 cache	2.9 GHz (i5-4570S) Intel Core i5 with 6 MB on-chip L3 cache	3.2 GHz (i5-4570) Intel Core i5 with 6 MB on-chip L3 cache	3.4 GHz (i5-4670) Intel Core i5 with 6 MB on-chip L3 cache	1.4 GHz (i5-4260U) Intel Core i5 with 3 MB shared L3 cache	1.6 GHz (i5-5250U) Intel Core i5 with 3 MB shared L3 cache	2.8 GHz (i5-5575R) Intel Core i5 with 4 MB shared L3 cache
Processor	N/A	Optional: 3.1 GHz quad-core Intel Core i7 (i7-3770S)	N/A	Optional: 3.4 GHz quad-core Intel Core i7 with 8 MB on-chip L3 cache (i7-3770)	N/A	N/A	Optional: 3.1 GHz quad-core Intel Core i7 with 8 MB on-chip L3 cache (i7-4770S)	N/A	Optional: 3.5 GHz quad-core Intel Core i7 with 8 MB on-chip L3 cache (i7-4771)	N/A	N/A	N/A
System bus	Intel Direct Media Interface
System bus	5 GT/s
Memory	8 GB (two 4 GB, not user-accessible "AASP Installable Slot") Optional: 16 GB		8 GB (two 4 GB, two slots empty) Optional: 16 GB and 32 GB		4 GB (two 2 GB, not user-accessible "AASP Installable Slot")	8 GB (two 4 GB, not user-accessible "AASP Installable Slot") Optional: 16 GB		8 GB (two 4 GB, two slots empty) Optional: 16 GB and 32 GB		8 GB (soldered on-board)	8 GB (soldered on-board) Optional: 16 GB
Memory	1600 MHz PC3-12800 DDR3 SO-DIMM SDRAM									1600 MHz PC3-12800 LPDDR3 SDRAM (soldered on-board)	1867 MHz PC3-14900 LPDDR3 SDRAM (soldered on-board)
Graphics	Nvidia GeForce GT 640M with 512 MB of GDDR5 SDRAM	Nvidia GeForce GT 650M with 512 MB of GDDR5 SDRAM	Nvidia GeForce GTX 660M with 512 MB of GDDR5 SDRAM	Nvidia GeForce GTX 675MX with 1 GB of GDDR5 SDRAM Optional: Nvidia GeForce GTX 680MX with 2 GB of GDDR5 SDRAM	Intel HD Graphics 4000	Intel Iris Pro Graphics 5200	Nvidia GeForce GT 750M with 1 GB of GDDR5 SDRAM	Nvidia GeForce GT 755M with 1 GB of GDDR5 SDRAM	Nvidia GeForce GTX 775M with 2 GB of GDDR5 SDRAM Optional: Nvidia GeForce GTX 780M with 4 GB of GDDR5 SDRAM	Intel HD Graphics 5000	Intel HD Graphics 6000	Intel Iris Pro Graphics 6200
Hard drive	1 TB Optional: 1 TB Fusion, 128 GB, 256 GB or 512 GB SSD Fusion Drive initially only for high-end model, later added low-end model support^[26]^[27]		1 TB Optional: 3 TB HDD, 1 TB or 3 TB Fusion, 256 GB, 512 GB or 768 GB SSD		500 GB	1 TB Optional: 1 TB Fusion, 256 GB or 512 GB SSD		1 TB Optional: 3 TB HDD, 1 TB or 3 TB Fusion, 256 GB, 512 GB or 1 TB SSD		500 GB Optional: 1 TB HDD, 1 TB Fusion, or 256 GB SSD	1 TB Optional: 1 TB Fusion or 256 GB SSD	1 TB Optional: 1 TB Fusion, 2 TB Fusion, or 256 GB SSD
Hard drive	Serial ATA 5400 rpm		Serial ATA 7200 rpm		Serial ATA 5400 rpm	Serial ATA 5400 rpm and PCI-e for SSD		Serial ATA 7200 rpm and PCI-e for SSD		Serial ATA 5400 rpm and PCI-e for SSD	Serial ATA 5400 rpm and PCI-e for SSD
Optical drive	N/A
Connectivity	Internal AirPort Extreme 802.11a/b/g/n Gigabit Ethernet Bluetooth 4.0					Internal AirPort Extreme 802.11a/b/g/n/ac Gigabit Ethernet Bluetooth 4.0
Peripherals	4x USB 3.0 SDXC Card slot Headphone/digital audio output 2x Thunderbolt ports Mini DisplayPort to VGA, DVI, HDMI and DisplayPort adapters available Kensington Lock Slot										Replace: 2x Thunderbolt 2 ports
Camera	FaceTime HD camera 720p (1280 × 720; 0.9 MP)
Maximum operating system	OS X El Capitan

iMac with Retina display

A Retina Display "5K" model with a resolution of 5120 x 2880 was introduced alongside the previous year's models during a keynote on October 16, 2014. This 27" model was given faster Haswell processors and its two Thunderbolt ports were updated to Thunderbolt 2. Secondary storage was also upgraded to a 1 TB Fusion drive as standard and video options changed over to AMD Radeon R9 M290X and M295X. A 21.5 inch "4K" model with a resolution of 4096 x 2304 was released on October 13, 2015.

Specifications of iMacs with Retina display from 2014
Model	Late 2014	Mid 2015	Late 2015
Release date	October 16, 2014	May 19, 2015	October 13, 2015
Part Number^[28]	MF886XX/A	MF885XX/A	MK452XX/A	MK462XX/A	MK472XX/A	MK482XX/A
Model Number	A1419		A1418	A1419
EMC Number	2806		2833	2834
Model ID^[29]	iMac15,1		iMac16,2	iMac17,1
Enclosure	Aluminum and glass
Display	27 in; 5120 × 2880		21.5 in; 4096 × 2304	27 in; 5120 × 2880
Display	Glossy glass-covered widescreen 16:9, LED backlighting and IPS technology		Glossy glass-covered widescreen 16:9, LED backlighting and IPS technology with P3 color gamut
Processor	3.5 GHz (i5-4690) Intel Core i5 with 6 MB shared L3 cache	3.3 GHz (i5-4590) Intel Core i5 with 6 MB shared L3 cache	3.1 GHz (i5-5675R) Intel Core i5 with 4 MB shared L3 cache and 128 MB L4 cache	3.2 GHz (i5-6500) Intel Core i5 with 6 MB shared L3 cache		3.3 GHz (i5-6600) Intel Core i5 with 6 MB shared L3 cache
Processor	Optional: 4.0 GHz quad-core Intel Core i7 with 8 MB shared L3 cache (i7-4790K)	N/A	Optional: 3.3 GHz quad-core Intel Core i7 with 6 MB shared L3 cache and 128 MB L4 cache (i7-5775R)	N/A	Optional: 4.0 GHz quad-core Intel Core i7 with 8 MB shared L3 cache (i7-6700K)
System bus	Intel Direct Media Interface 2.0			Intel Direct Media Interface 3.0
System bus	5 GT/s			8 GT/s
Memory	8 GB (two 4 GB, two slots empty) Optional: 16 GB and 32 GB		8 GB (soldered on-board) Optional: 16 GB	8 GB (two 4 GB, two slots empty) Optional: 16 GB and 32 GB, expandable to 64 GB with third party modules.^[30]
Memory	1600 MHz PC3-12800 DDR3 SO-DIMM SDRAM		1867 MHz PC3-14900 LPDDR3 SDRAM (soldered on-board)	1867 MHz PC3-14900 DDR3L SO-DIMM SDRAM
Graphics	AMD Radeon R9 M290X with 2 GB of GDDR5 SDRAM Optional: AMD Radeon R9 M295X with 4 GB of GDDR5 SDRAM 30bit Deep Color^[31]	AMD Radeon R9 M290 with 2 GB of GDDR5 SDRAM 30bit Deep Color	Intel Iris Pro Graphics 6200	AMD Radeon R9 M380 with 2 GB of GDDR5 SDRAM 30bit Deep Color	AMD Radeon R9 M390 with 2 GB of GDDR5 SDRAM 30bit Deep Color	AMD Radeon R9 M395 with 2 GB of GDDR5 SDRAM Optional: AMD Radeon R9 M395X with 4 GB of GDDR5 SDRAM 30bit Deep Color
Hard drive	1 TB Fusion Optional: 3 TB Fusion, 256 GB, 512 GB or 1 TB SSD	1 TB Optional: 3 TB HDD, 1 TB or 3 TB Fusion, 256 GB, 512 GB or 1 TB SSD	1 TB Optional: 1 TB or 2 TB Fusion, 256 GB or 512 GB SSD	1 TB Optional: 3 TB HDD, 1 TB, 2 TB or 3 TB Fusion, 256 GB or 512 GB SSD	1 TB Fusion Optional: 2 TB or 3 TB Fusion, 256 GB, 512 GB or 1 TB SSD	2 TB Fusion Optional: 3 TB Fusion, 256 GB, 512 GB or 1 TB SSD
Hard drive	Serial ATA 7200 rpm and PCI-e for SSD		Serial ATA 5400 rpm and PCI-e for SSD	Serial ATA 7200 rpm and PCI-e for SSD
Optical drive	N/A
Connectivity	Internal AirPort Extreme 802.11a/b/g/n/ac Gigabit Ethernet Bluetooth 4.0
Peripherals	4x USB 3.0 SDXC Card slot Headphone/digital audio output 2x Thunderbolt 2 ports Mini DisplayPort to VGA, DVI, HDMI and DisplayPort adapters available Kensington Lock Slot
Camera	FaceTime HD camera 720p (1280 × 720; 0.9 MP)
Maximum operating system	OS X El Capitan

Timeline of iMac models

References

↑ https://www.apple.com/imac/design/ - Retrieved December 2012
↑ "Apple – iMac – Intel Core Duo". Apple Inc. Archived from the original on May 29, 2006. Retrieved March 1, 2007.
↑ AirPort Extreme performance page see footnote 2
↑ "iMac (Early 2006) – Technical Specifications". Apple Inc. Retrieved October 22, 2009.
↑ "iMac (Mid 2006) – Technical Specifications". Apple Inc. Retrieved October 22, 2009.
↑ "iMac (Late 2006) – Technical Specifications". Apple Inc. Retrieved October 22, 2009.
↑ How to identify your iMac, Apple Inc., retrieved September 28, 2010
1 2 Mac OS X keyboard shortcuts Apple.com; June 25, 2010
↑ "iMac (Mid 2007) – Technical Specifications". Apple Inc. Retrieved October 22, 2009.
↑ "iMac (Early 2008) – Technical Specifications". Apple Inc. Retrieved October 22, 2009.
↑ "iMac (Early 2009) – Technical Specifications". Apple Inc. Retrieved October 22, 2009.
↑ iMac (Early 2009) – Technical Specifications, Apple Inc., retrieved January 24, 2012
↑ "iMac (21.5 and 27-inch, Late 2009) – Technical Specifications". Apple Inc. Retrieved October 22, 2009.
↑ "iMac (21.5 and 27-inch, Mid 2010) – Technical Specifications". Apple Inc. Retrieved July 27, 2010.
↑ "iMac (21.5 and 27-inch, Mid 2011) – Technical Specifications". Apple Inc. Retrieved November 7, 2011.
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↑ http://bgr.com/2012/10/24/apple-imac-non-upgradable-ram/
↑ http://www.ifixit.com/Teardown/iMac+Intel+21.5-Inch+EMC+2544+Teardown/11936/2
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↑ http://support.apple.com/kb/ht1758
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↑ See System Profiler at El Capitan

Preceded by iMac G5	iMac (Intel-based) January 10, 2006	Succeeded by –

Apple hardware since 1998

Consumer desktop/all-in-ones	eMac iMac G3 G4 G5 Intel-based Mac Mini

Professional tower/desktop	Mac Pro Power Macintosh G3 Beige G3 Blue & White G4 G4 Cube G5 Xserve

Consumer notebook	iBook MacBook Retina MacBook Air

Professional notebooks	PowerBook G3 G4 MacBook Pro

Consumer electronics	Apple TV Apple Watch Displays Thunderbolt Cinema Studio iPad 1st 2nd 3rd 4th Air Air 2 iPad Mini 1st 2 3 4 iPad Pro iPhone 1st 3G 3GS 4 4S 5 5C 5S 6 / 6 Plus 6S / 6S Plus SE iPod Classic Photo Mini iPod+HP Shuffle Nano Touch Newton MessagePad eMate 300

Accessories	AirPort Express Extreme Time Capsule iPod Click Wheel iPod Hi-Fi Nike+ iSight Keyboard Wireless Trackpad Magic Magic 2 Mouse USB Pro Wireless Mighty Magic Pencil Remote Siri Remote SuperDrive USB Modem Xserve RAID

Apple hardware before 1998

Apple hardware

Mac

Desktop

Current	iMac Mac Pro Mac Mini

Discontinued	Apple I Apple II series Apple III Apple Lisa Compact Macintosh Macintosh II series Macintosh SE Macintosh SE/30 Macintosh Classic Macintosh LC Macintosh LCII Macintosh Quadra Macintosh Performa Macintosh Centris Power Mac eMac

Laptop

Current	MacBook (Retina) MacBook Air MacBook Pro

Discontinued	Macintosh Portable PowerBook iBook MacBook (pre-2015)

Server

Discontinued	Apple Workgroup Server Apple Network Server Xserve Mac Mini Mac Pro

Devices

Current	Apple TV Apple Watch iPad Air Air 2 iPad Mini 2 4 iPad Pro iPhone 6 / 6 Plus 6S / 6S Plus SE iPod Nano Shuffle Touch

Discontinued	Interactive TV Box iPad 1st 2nd 3rd 4th iPad Mini 1st 3 iPhone 1st 3G 3GS 4 4S 5 5S 5C iPod Classic iPod Hi-Fi iPod Mini Newton Apple Pippin PowerCD Apple QuickTake

Accessories

Current	AirPort AirPort Express Router AirPort Extreme Router AirPort Time Capsule Displays Apple Thunderbolt Display Magic Mouse 2 Magic Trackpad 2 Apple Pencil Smart Keyboard Remote Siri Remote External SuperDrive Magic Keyboard

Discontinued	Displays Cinema Studio Drives iSight Modems Printers Scanners Mighty Mouse Magic Mouse Magic Trackpad Apple Wireless Keyboard

Apple Mobile Processors

64-bit	Apple A7 Apple A8 Apple A8X Apple A9 Apple A9X

32-bit	Apple A4 Apple A5 Apple A5X Apple A6 Apple A6X Apple S1

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