Home Desktops Apple iMac (20-inch, Early 2008) Apple · iMac
iMac (20-inch, Early 2008) Released April 2008
An aluminium all-in-one with a 20-inch glossy display, Core 2 Duo processor and dedicated ATI graphics.
Compare with another desktop Compare with… iMac 24″ (M4) (2024) iMac 24″ (M3) (2023) iMac 24″ (M1) (2021) iMac (Retina 5K, 27-inch, 2020) (2020) iMac (Retina 4K, 21.5-inch, 2019) (2019) iMac (Retina 5K, 27-inch, 2019) (2019) iMac Pro (2017) (2017) iMac (21.5-inch, 2017) (2017) iMac (Retina 4K, 21.5-inch, 2017) (2017) iMac (Retina 5K, 27-inch, 2017) (2017) iMac (21.5-inch, Late 2015) (2015) iMac (Retina 4K, 21.5-inch, Late 2015) (2015) iMac (Retina 5K, 27-inch, Late 2015) (2015) iMac (Retina 5K, 27-inch, Mid 2015) (2015) iMac (Retina 5K, 27-inch, Late 2014) (2014) iMac (21.5-inch, Mid 2014) (2014) iMac (21.5-inch, Late 2013) (2013) iMac (27-inch, Late 2013) (2013) iMac (21.5-inch, Early 2013) (2013) iMac (27-inch, Late 2012) (2012) iMac (21.5-inch, Late 2012) (2012) iMac (21.5-inch, Late 2011) (2011) iMac (21.5-inch, Mid 2011) (2011) iMac (27-inch, Mid 2011) (2011) iMac (21.5-inch, Mid 2010) (2010) iMac (27-inch, Mid 2010) (2010) iMac (21.5-inch, Late 2009) (2009) iMac (27-inch, Late 2009) (2009) iMac (20-inch, Mid 2009) (2009) iMac (20-inch, Early 2009) (2009) iMac (24-inch, Early 2009) (2009) iMac (24-inch, Early 2008) (2008) iMac (20-inch, Mid 2007) (2007) iMac (24-inch, Mid 2007) (2007) iMac (17-inch, Late 2006) (2006) iMac (20-inch, Late 2006) (2006) iMac (24-inch, Late 2006) (2006) iMac (17-inch, Mid 2006) (2006) iMac (17-inch, Early 2006) (2006) iMac (20-inch, Early 2006) (2006) iMac G5 (17-inch, iSight) (2005) iMac G5 (20-inch, iSight) (2005) iMac G5 (17-inch, Ambient Light Sensor) (2005) iMac G5 (20-inch, Ambient Light Sensor) (2005) iMac G5 (17-inch, 2004) (2004) iMac G5 (20-inch, 2004) (2004) iMac G4 (20-inch, USB 2.0) (2003) iMac G4 (15-inch, USB 2.0) (2003) iMac G4 (17-inch, USB 2.0) (2003) iMac G4 (15-inch, Early 2003) (2003) iMac G4 (17-inch, Early 2003) (2003) iMac G4 (17-inch, Flat Panel) (2002) iMac G4 (15-inch, Flat Panel) (2002) iMac G3 (Summer 2001) (2001) iMac G3 (Early 2001) (2001) iMac G3 (Summer 2000) (2000) iMac G3 (Slot Loading, 1999) (1999) iMac G3 (Mid 1999) (1999) iMac G3 (Early 1999) (1999) iMac G3 (Revision B) (1998) iMac G3 (1998) (1998) Mac mini (M6 or M5 Pro) (2026) Mac Studio (M5 Max or M5 Ultra) (2026) Mac Studio (M4 Max or M3 Ultra) (2025) Mac mini (M4 or M4 Pro) (2024) Mac Pro (M2 Ultra) (2023) Mac Studio (M2 Max or M2 Ultra) (2023) Mac mini (M2 or M2 Pro) (2023) Mac Studio (M1 Max / M1 Ultra) (2022) Mac mini (M1) (2020) Mac Pro (2019) (2019) Mac mini (2018) (2018) Mac mini (Late 2014) (2014) Mac Pro (Late 2013) (2013) Mac mini (Late 2012) (2012) Mac Pro (Mid 2012) (2012) Mac mini (Mid 2011) (2011) Mac Pro (Mid 2010) (2010) Mac mini (Mid 2010) (2010) Mac mini (Late 2009) (2009) Mac mini (Early 2009) (2009) Mac Pro (Early 2009) (2009) Mac Pro (Early 2008) (2008) Mac mini (Mid 2007) (2007) Mac mini (Late 2006) (2006) Mac Pro (2006) (2006) Mac mini (Early 2006) (2006) Power Mac G5 (Late 2005) (2005) eMac (2005) (2005) Power Mac G5 (Early 2005) (2005) Mac mini (2005) (2005) Power Mac G5 (Late 2004) (2004) Power Mac G5 (June 2004) (2004) eMac (USB 2.0, 2004) (2004) Power Mac G5 (2003) (2003) Power Mac G4 (Mirrored Drive Doors 2003) (2003) eMac (ATI Graphics, 2003) (2003) Power Mac G4 (FW800) (2003) Power Mac G4 (Mirrored Drive Doors 2002) (2002) eMac (2002) (2002) Power Mac G4 (QuickSilver 2002) (2002) Power Mac G4 (QuickSilver 2001) (2001) Power Mac G4 (Digital Audio) (2001) Power Mac G4 Cube (2000) Power Mac G4 (Gigabit Ethernet) (2000) Power Mac G4 (PCI Graphics) (1999) Power Macintosh G3 (Blue and White) (1999) Power Mac G4 (AGP Graphics) (1999) Power Macintosh G3 Desktop (1997) Power Macintosh G3 Mini Tower (1997) Power Macintosh 8600/300 (1997) Power Macintosh 9600/300 (1997) Power Macintosh 9600/350 (1997) Power Macintosh 4400/200 (1997) Power Macintosh 5400/200 (1997) Power Macintosh 5500/225 (1997) Power Macintosh 5500/250 (1997) Power Macintosh 5500/275 (1997) Power Macintosh 6500/225 (1997) Power Macintosh 6500/250 (1997) Power Macintosh 6500/275 (1997) Power Macintosh 6500/300 (1997) Power Macintosh 7300/166 (1997) Power Macintosh 7300/180 (1997) Power Macintosh 7300/200 (1997) Power Macintosh 7600/200 (1997) Power Macintosh 8600/200 (1997) Power Macintosh 8600/250 (1997) Power Macintosh 9600/200 (1997) Power Macintosh 9600/200MP (1997) Power Macintosh 9600/233 (1997) Power Macintosh 4400/160 (1996) Power Macintosh 6300/120 (1996) Macintosh Performa 5400/160 (1996) Macintosh Performa 6360 (1996) Macintosh Performa 6400/180 (1996) Macintosh Performa 6400/200 (1996) Power Macintosh 5260/100 (1996) Power Macintosh 5260/120 (1996) Power Macintosh 5400/120 (1996) Power Macintosh 5400/180 (1996) Power Macintosh 7200/100 (1996) Power Macintosh 7200/120 (1996) Power Macintosh 7600/120 (1996) Power Macintosh 7600/132 (1996) Power Macintosh 8200/100 (1996) Power Macintosh 8200/120 (1996) Power Macintosh 8500/132 (1996) Power Macintosh 8500/150 (1996) Power Macintosh 8500/180 (1996) Power Macintosh 9500/150 (1996) Power Macintosh 9500/180MP (1996) Power Macintosh 9500/200 (1996) Macintosh LC 580 (1995) Macintosh Performa 5200CD (1995) Macintosh Performa 5300CD (1995) Macintosh Performa 6300CD (1995) Power Macintosh 6100/66 (1995) Power Macintosh 6100/66 DOS Compatible (1995) Power Macintosh 6100/66AV (1995) Power Macintosh 6200/75 (1995) Power Macintosh 7100/80 (1995) Power Macintosh 7100/80AV (1995) Power Macintosh 7200/75 (1995) Power Macintosh 7200/90 (1995) Power Macintosh 7500/100 (1995) Power Macintosh 8100/100 (1995) Power Macintosh 8100/100AV (1995) Power Macintosh 8500/120 (1995) Power Macintosh 9500/120 (1995) Power Macintosh 9500/132 (1995) Macintosh Quadra 610 DOS Compatible (1994) Power Macintosh 6100/60 (1994) Macintosh LC 550 (1994) Macintosh LC 575 (1994) Macintosh LC 630 (1994) Macintosh Quadra 630 (1994) Power Macintosh 6100/60AV (1994) Power Macintosh 7100/66 (1994) Power Macintosh 7100/66AV (1994) Power Macintosh 8100/110 (1994) Power Macintosh 8100/80 (1994) Power Macintosh 8100/80AV (1994) Macintosh TV (1993) Macintosh Color Classic (1993) Macintosh Centris 610 (1993) Macintosh Centris 650 (1993) Macintosh Centris 660AV (1993) Macintosh LC 475 (1993) Macintosh LC 520 (1993) Macintosh LC III (1993) Macintosh Quadra 605 (1993) Macintosh Quadra 610 (1993) Macintosh Quadra 650 (1993) Macintosh Quadra 800 (1993) Macintosh Quadra 840AV (1993) Macintosh Quadra 950 (1992) Macintosh LC II (1992) Macintosh Quadra 700 (1991) Macintosh Quadra 900 (1991) Macintosh Classic II (1991) Macintosh Classic (1990) Macintosh IIsi (1990) Macintosh LC (1990) Macintosh IIfx (1990) Macintosh IIci (1989) Macintosh IIcx (1989) Macintosh SE FDHD (1989) Macintosh SE/30 (1989) Macintosh IIx (1988) Macintosh II (1987) Macintosh SE (1987) Macintosh Plus (1986) Apple IIgs (1986) (1986) Macintosh XL (1985) Macintosh 512K (1984) Macintosh 128K (1984) Macintosh 512Ke Macintosh Color Classic II Macintosh IIvi Macintosh IIvx Macintosh LC 630 DOS Compatible Macintosh LC III+ Macintosh Performa 600 Power Macintosh G3 All-In-One Twentieth Anniversary Macintosh NUC 15 Pro (2025) Desktop (AMD Ryzen AI Max 300 Series) (2025) OmniStudio X 31.5″ All-in-One (2024) IdeaCentre AIO 27IPH11 (2026) IdeaCentre AIO 27ARR9 (2024) Model history · 8 models, 2003–2008 2003 iMac G4 (20-inch, USB 2.0) Compare 2004 iMac G5 (20-inch, 2004) Compare 2005 iMac G5 (20-inch, Ambient Light Sensor) Compare 2005 iMac G5 (20-inch, iSight) Compare 2006 iMac (20-inch, Early 2006) Compare 2006 iMac (20-inch, Late 2006) Compare 2007 iMac (20-inch, Mid 2007) Compare 2008 iMac (20-inch, Early 2008)
Type All-in-one
Processor Intel Core 2
Memory 1 GB – 4 GB
Storage 250 GB – 750 GB
Screen 20″
Weight –
Processor Intel Core 2 Duo E8135 or Intel Core 2 Duo E8335
CPU cores 2
Graphics ATI Radeon HD 2400 XT (128 MB GDDR3) or ATI Radeon HD 2600 PRO (256 MB GDDR3)
Memory 1 GB, 2 GB or 4 GB
Storage 250 GB to 750 GB
CPU 2.4 GHz Intel Core 2 Duo E8135 or 2.66 GHz E8335; 6 MB shared L2 cache and 1066 MHz frontside bus. Exact processor identities cross-checked with EveryMac.
GPU ATI Radeon HD 2400 XT with 128 MB GDDR3 on the 2.4 GHz model; Radeon HD 2600 PRO with 256 MB GDDR3 on the 2.66 GHz model
Memory type Two user-accessible SO-DIMM slots for 800 MHz DDR2 SDRAM; 1 GB standard on the 2.4 GHz model, configurable to 2 or 4 GB; 2 GB standard on the 2.66 GHz model, configurable to 4 GB
Storage type 7200 rpm Serial ATA hard drive; 250 GB on the 2.4 GHz model, configurable to 320 or 500 GB; 320 GB on the 2.66 GHz model, configurable to 500 or 750 GB. Slot-loading 8x SuperDrive with 4x double-layer DVD burning. Display
Screen size 20″
Resolution 1680 × 1050
Brightness 290 nits
Display type Glossy widescreen TFT active-matrix LCD, millions of colours; typical contrast 800:1 and 160° horizontal and vertical viewing angles. Panel technology and refresh rate unpublished and omitted. Connections
Ports 3 × USB-A, Ethernet, headphone jack
Ethernet 1 Gb/s
External displays Up to 1
Wi-Fi 802.11n draft; compatible with 802.11a/b/g
Bluetooth 2.1 + EDR
Camera iSight camera
Back ports Three USB 2.0 ports on the computer, plus two on the supplied keyboard; one FireWire 400 and one FireWire 800 port, each rated 7 W; mini-DVI output, Gigabit Ethernet, headphone/optical digital output and line-in/optical digital input. FireWire, mini-DVI and audio input described here.
External displays One external display in extended desktop or mirroring mode; digital resolutions up to 1920 × 1200 and analogue up to 2048 × 1536. DVI, VGA, S-video and composite adapters sold separately.
Speakers Built-in stereo speakers with internal 24 W digital amplifier and built-in microphone
Keyboard and mouse Apple Keyboard, Mighty Mouse and infrared Apple Remote; optional wireless keyboard and wireless Mighty Mouse Design and power
Type All-in-one
Width × depth × height 485 × 189 × 469 mm
Operating system macOS
Size and weight detail Maker weight 20 pounds (9.1 kg), varying by configuration and manufacturing process; shared scalar weight omitted
Power supply Maximum continuous power 200 W; 100–240 V AC, 50–60 Hz single phase
Power use Apple environmental report at 230 V records 1.22 W off, 2.20 W sleep and 33.2 W idle with display off or 66.8 W with display on; display on means full brightness
Materials Recyclable aluminium and glass enclosure; arsenic-free display glass, majority of circuit-board laminates free of brominated flame retardants and PVC-free internal cables
In the box iMac, Apple Keyboard, Mighty Mouse, Apple Remote, cleaning cloth, power cord, install/restore DVDs and documentation; Mac OS X Leopard and iLife '08 Configurations Processor Memory Storage Storage type Graphics Intel Core 2 Duo E8135 1 GB 250 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 1 GB 320 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 1 GB 500 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 2 GB 250 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 2 GB 320 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 2 GB 500 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 4 GB 250 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 4 GB 320 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8135 4 GB 500 GB Hard drive ATI Radeon HD 2400 XT (128 MB GDDR3) Intel Core 2 Duo E8335 2 GB 320 GB Hard drive ATI Radeon HD 2600 PRO (256 MB GDDR3) Intel Core 2 Duo E8335 2 GB 500 GB Hard drive ATI Radeon HD 2600 PRO (256 MB GDDR3) Intel Core 2 Duo E8335 2 GB 750 GB Hard drive ATI Radeon HD 2600 PRO (256 MB GDDR3) Intel Core 2 Duo E8335 4 GB 320 GB Hard drive ATI Radeon HD 2600 PRO (256 MB GDDR3) Intel Core 2 Duo E8335 4 GB 500 GB Hard drive ATI Radeon HD 2600 PRO (256 MB GDDR3) Intel Core 2 Duo E8335 4 GB 750 GB Hard drive ATI Radeon HD 2600 PRO (256 MB GDDR3)
Pros and cons Pros + Camera, speakers and microphone built in+ Two user-accessible memory slots+ Keyboard, mouse and remote includedCons − Glossy screen with no matte option− USB ports limited to USB 2.0− No factory solid-state drive optionPrevious model: iMac (20-inch, Mid 2007) . Newer model: iMac (20-inch, Early 2009) .
