please i need help reinstaling os in a 2011 imac, especification are below , if possible on ou one

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please i need help reinstaling os in a 2011 imac, especification are below , if possible on ou one

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Introduction Date:

May 3, 2011

Discontinued Date:

October 23, 2012

Processors:

1 (4 Cores)

Architecture:

64-Bit

Geekbench 2 (32):

7241

Geekbench 2 (64):

7970

Geekbench 3 (32):

2464

Geekbench 3 (32):

6698

Geekbench 3 (64):

2637

Geekbench 3 (64):

7237

Geekbench 4 (SC):

3127

Geekbench 4 (MC):

7830

Processor Speed:

2.5 GHz

Processor Type:

Core i5 (I5-2400S)

Details:

This model is powered by a 32 nm, 64-bit Intel Core i5 "Sandy Bridge" processor with quad cores (four independent processor cores on a single silicon chip, each with one thread). Each core has a dedicated 256k level 2 cache and all processor cores share a single 6 MB level 3 cache It also supports Turbo Boost 2.0 (up to 3.3 GHz) -- which "automatically boosts the processor speed based on workload" (so if an application is only using one of the four cores it will automatically increase the speed of the core in use and turn off the unused cores).
Also see: How much faster are the "Mid-2011" Aluminum iMac models than the "Mid-2010" models?

Turbo Boost:

3.3 GHz

Custom Speeds:

N/A

Processor Upgrade:

LGA 1155 (Socket H2)*

FPU:

Integrated

System Bus Speed:

5 GT/s*

Cache Bus Speed:

2.5 GHz (Built-in)

ROM/Firmware Type:

EFI

EFI Architecture:

64-Bit

L1 Cache:

32k/32k

L2/L3 Cache:

256k (x 4), 6 MB

RAM Type:

PC3-10600 DDR3

Min. RAM Speed:

1333 MHz

Details:

Supports 1333 MHz PC3-10600 DDR3 SO-DIMMs (204-pin).
Also see: How do you upgrade the RAM in this Aluminum iMac model? How much RAM does it actually support?

Standard RAM:

4 GB

Maximum RAM:

32 GB*

Details:

By default, 4 GB of RAM is installed as two 2 GB SO-DIMM modules. Two slots free.
*Officially, this model supports four 4 GB modules -- one in each slot for a maximum of 16 GB of memory. However, third-parties have discovered that it actually will support 32 GB of memory using four 8 GB modules.
In the US (and many other countries), site sponsor Other World Computing sells memory -- as well as other upgrades -- for this iMac.
In the UK, site sponsor Flexx sells memory and other upgrades for this iMac.
In Australia, site sponsor RamCity sells memory and other upgrades for this iMac.
In Southeast Asia, site sponsor SimplyMac.sg sells memory and other upgrades for this iMac.
Also see: Actual Max RAM of All G3 & Later Macs.

Motherboard RAM:

None

RAM Slots:

4

Video Card:

Radeon HD 6750M

VRAM Type:

GDDR5

Details:

This model has an AMD Radeon HD 6750M graphics processor with 512 MB of dedicated GDDR5 memory.
Also see: What type of video processor is provided by the Aluminum iMac systems? Is it upgradable?

Standard VRAM:

512 MB

Maximum VRAM:

512 MB

Built-in Display:

21.5" 16:9 Widescreen

Native Resolution:

1920x1080

Details:

This model has a 21.5" glossy LED-backlit 16:9 widescreen TFT active matrix display with "IPS technology" and a native resolution of 1920x1080. Apple also reports a viewing angle of 178 degrees horizontal and 178 degrees vertical. The contrast ratio is 1000:1.
In the US, site sponsor BeetsTech sells Apple OEM parts. Apple parts available include display panels, logic boards, graphics cards, interior cables and sensors, and more for this iMac.
Worldwide, site sponsor Shenzhen Parts sells quality, brand new, factory-direct parts with global shipping and bulk discounts for repair shops. Replacement parts include display panels, cover glass, speakers, cameras, and more for this iMac.

2nd Display Support:

Dual/Mirroring

2nd Max. Resolution:

2560x1600

Details:

Apple reports that this model simultaneously supports the native resolution of the built-in display and up-to a 30-inch external display (2560x1600).

Standard Storage:

500 GB HDD

Std. Storage Speed:

7200 RPM

Details:

Also see: How do you upgrade the hard drive in the "Late 2009," "Mid-2010" and "Mid-2011" Aluminum iMac models? What type of storage do they support? Is it even possible to upgrade these models?
In the US (and many other countries), site sponsor Other World Computing sells storage upgrades for this iMac.
In the UK, site sponsor Flexx sells storage upgrades for this iMac.
In Australia, site sponsor RamCity sells storage upgrades for this iMac.
In Southeast Asia, site sponsor SimplyMac.sg sells storage upgrades for this iMac.
Also see: SSD Compatibility Guide for All G3 & Later Macs.

Storage Dimensions:

3.5" (26.10 mm)/2.5" (7 mm)

Storage Interface:

Serial ATA (6 Gb/s*)

Standard Optical:

8X DL "SuperDrive"

Standard Disk:

None

Standard Modem:

None

Standard Ethernet:

10/100/1000Base-T

Details:

N/A

Standard AirPort:

802.11a/b/g/n (450 Mbit*)

Standard Bluetooth:

2.1+EDR

USB Ports:

4 (2.0)

Firewire Ports:

1 (800)

Expansion Slots:

SDXC SD Card

Expansion Bays:

None

Details:

In the US (and many other countries), site sponsor Other World Computing sells a wide variety of external expansion options and hand-picked accessories like external storage, stands, keyboards, cables, adapters, speakers, and more for this iMac.
In Australia, site sponsor Macfixit offers an extensive selection of external expansion options and accessories like docks, stands, chargers, keyboards, security products, and more for this iMac.

Incl. Keyboard:

Apple Wireless Keyboard

Incl. Input:

Magic Mouse/Trackpad

Case Type:

All-in-One

Form Factor:

iMac (Late 2009)

Apple Order No:

MC309LL/A

Apple Subfamily:

Mid-2011

Apple Model No:

A1311 (EMC 2428)

Model ID:

iMac12,1

Details:

Please note that these identifiers refer to more than one model.
Also see: All Macs with the A1311 Model Number, the 2428 EMC Number, and the iMac12,1 Model Identifier.
For more about these identifiers and how to locate them on each Mac, please refer to EveryMac.com's Mac Identification section.

Battery Type:

N/A

Battery Life:

N/A

Pre-Installed MacOS:

X 10.6.6 (10J4026)

Maximum MacOS:

X 10.13.x*

Minimum Windows:

7 (32-Bit)*

Maximum Windows:

8.1 (64-Bit)*

MacOS 9 Support:

None

Windows Support:

Boot/Virtualization

Details:

Also see: Are there any third-party programs to run Mac OS 9/Classic applications on Intel Macs?
Site sponsor OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.
For more on running Windows on Intel Macs, please refer to the exhaustive Windows on Mac Q&A.

Dimensions:

17.75 x 20.8 x 7.42

Avg. Weight:

20.5 lbs. (9.3 kg)

Original Price (US):

US$1199

Est. Current Retail:

US$700-US$1000

Details:

Please note that on average the estimated current retail pricing of used systems is updated twice a year (please refer to the date on the bottom of the page for the date last updated).
Photo Credit: Apple, Inc.

iMac

Posted on Sep 2, 2018 5:06 PM

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Answer 1

Best reply

Kappy

Level 10

361,741 points

Sep 2, 2018 5:23 PM in response to richardo51

You can purchase Snow Leopard through the Apple Store: Mac OS X 10.6 Snow Leopard - Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order. After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store.

Snow Leopard General Requirements

1. Mac computer with an Intel processor

2. 1GB of memory

3. 5GB of available disk space

4. DVD drive for installation

5. Some features require a compatible Internet service provider;

fees may apply.

6. Some features require Apple’s iCloud services; fees and

terms apply.

If you have the two restore DVDs you can do this:

Snow Leopard Erase and Install

Insert Snow Leopard DVD or Disk 1 of the disks that came with the computer into the optical drive and restart the computer.
Immediately at hearing the chime hold down the C key.
Release the key when the Apple logo appears and wait for the loading to finish.
After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities' menu. After Disk Utility loads select the out-dented disk entry from the side list (mfgr.'s ID and drive size.) Click on the Partition tab in the Disk Utility’s right window. Set the number of partitions to one (1) from the drop down menu. Click on the Options button and select GUID, click OK button, set the format type to MacOS Extended, Journaled. Finally, click on the Apply button.
After formatting has finished quit Disk Utility. Continue with the OS X installation and follow the directions.
When the installation has finished the computer will restart into the Setup Assistant. After you complete the Setup Assistant you will be running a fresh installation of Snow Leopard. Open Software Update and install the recommended updates.
If you are planning to sell or give your computer away, then do the following: After you reformat your hard drive and reinstall Snow Leopard, the computer restarts to a Welcome screen. To leave the Mac in an OOTB (Out Of The Box) state, don't continue with the setup. Instead, press Command and Q keys to shut down the computer. The Setup Assistant will guide the new owner through the setup process after he/she turns on the computer.
Download and install Mac OS X 10.6.8 Update Combo v1.1.

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please i need help reinstaling os in a 2011 imac, especification are below , if possible on ou one

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