Apple 21.5” iMac (Late 2009); iMac10,1 Installation Guides & Specifications

Upgrading theApple 21.5” iMac (Late 2009) RAM is very easy. Other upgrades or repair like the Hard Drive or the Optical Drive are a bit more advanced but still manageable. All You'll need is some simple tools, and the correct parts. We then urge you to follow the videos or the Apple manual provided on the links below.

Please see our Apple RAM Memory for iMac Apple 21.5” iMac (Late 2009) page to locate your Apple compatible RAM upgrade for your Mac, and we'll ship it fast from our warehouse in Victoria.

Please see our Hard Drive  for iMac 21.5" (Late 2009) page to locate your   Apple compatible Hard Drive upgrades for your iMac

Please see our DIY Installation Repair Kits for iMac 21.5" (Late 2009) page to locate your   DIY Installation Repair Kits for your iMac

Apple User Guides for the Apple iMac 21.5" (Late 2009)

iMac: How to remove or install memory Learn how to remove or install memory in your iMac computer on the Apple support page.

OWC Video Installation Guide for Apple 21.5” iMac (Late 2009):

Memory Install Video

OWC's step-by-step video of how to install memory in the Apple iMac 21" (Late 2009).
OWC Skill Level: "Easy" |  Duration: 4:12 

Recommended Tools for the RAM upgrade:

-   #2 Philips Screwdriver

Add a second hard drive or SSD easily with the OWC Data Doubler. Here's an instructional video from OWC:

Data Doubler Install Video

OWC's step-by-step video of how to install a drive into a DataDoubler for installing into the Apple iMac 21" (Late 2009).
OWC Skill Level: "Easy" |  Duration: 1:56 

Use the Optical Drive install videos below for iMac 21.5" (Late 2009) to install a DataDoubler mounted drive:

Optical Install Video

OWC's step-by-step video of how to upgrade/replace the optical drive in a Apple iMac 21.5" (Late 2009).
OWC Skill Level: "Involved" | Duration: 9:30 

Recommended Tools for the Data Doubler/Optibay upgrade: 

-   Heavy-duty Suction Cups 
-   Newer Technology 14 Piece Tool Set

Here is how to fix or upgrade the main Hard Drive:

NewerTech AdaptaDrive - Drive Install Video

OWC's step-by-step video of how to install a drive in a NewerTech AdaptaDrive. 

Use the Hard Drive Install Video below for iMac 21.5" (Late 2009) to install aNewerTech AdaptaDrive mounted drive: 

Hard Drive Installation Video

OWC's step-by-step video of how to install a hard drive in the Apple iMac 21.5" (Late 2009).
OWC Skill Level: "Involved" Duration: 8:42 

Before you replace your original Hard Drive you need to be aware of the heat sensor issue, if you're not have a look at this website. 

As explained you have 2 options to fix this:

Software fix with HDD Fan Control
Hardware fix with a OWC Heat Sensor DIY kit

Recommended Tools for the HDD/SSD upgrade: 

Heavy-duty Suction Cups 
Newer Technology 14 Piece Tool Set 
2.5" to 3.5" adapter - for SSD installation only 
External Hard Drive Enclosure - Convert your existing drive into an external one 

First make sure you understand the heat sensor issue mentioned above.

Here is some detailed specifications as well as direct link to available upgrades:

Apple 21.5” iMac (Late 2009)
Introduced October 2009
Discontinued July 2010
Model Identifier iMac10,1
Model Number A1311
EMC 2308
Order Number MB950LL/A (3.06 GHz : 500 GB), MC413LL/A (3.06 GHz : 1 TB)
Processor Intel Core 2 Duo (E7600, E8600) ("Wolfdale")
Processor Speed 3.06 or 3.33 GHz
Architecture 64-bit
Number of Cores 2
Cache 3 MB (3.06 GHz) 6 MB (3.33 GHz) shared L2
System Bus 1066 MHz
Standard Storage 500 GB, 1, or 2 TB (7200-rpm)
Link to upgrade tool & kits Heat sensor kit
Link to internal HDD Upgrade to a new 3.5” HDD
Link to internal SSD Upgrade to a new 2.5” SSD
Media Slot-loading 8x SuperDrive (DVD±R DL/DVD±RW/CD-RW)
Link to external optical drive Get an external burner here
Peripherals Apple Wireless Keyboard, Magic Mouse
Built-in Memory
Maximum Memory 16 GB
Memory Slots 4 - 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM
Interleaving Support Yes
Link to RAM upgrade Upgrade your RAM here
Built-in Display 21.5-inch (viewable) LED-backlit glossy widescreen TFT LCD with IPS
Resolutions 1920 by 1080 pixels
Graphics Card NVIDIA GeForce 9400M or ATI Radeon HD 4670
Graphics Memory 256 MB shared (GeForce 9400M) or 256 MB (Radeon HD 4670) GDDR3
Display Connection 1 - Mini DisplayPort
Display Modes Dual display extended, video mirroring, Target Display
External Resolution Up to 2560 by 1600 pixels
Camera Built-in iSight
Wi-Fi Built-in AirPort Extreme card (802.11a/b/g/n)
Bluetooth Built-in Bluetooth 2.1 + EDR
Ethernet 10/100/1000BASE-T (RJ-45)
USB 4 - 480 MBit/s
FireWire 1 - 800 MBit/s
Display 1 - Mini DisplayPort
Infrared 1 - For Apple Remote only
Audio In 1 - 3.5-mm analog/optical combo input jack, Built-in microphone
Audio Out 1 - 3.5-mm analog/optical combo output jack, Built-in speakers
Slots 1 - Secure Digital (SD)
Hard Drive Interface 3.0 Gbps Serial ATA (SATA)
Optical Drive Interface

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