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    iMac 21.5" (Mid 2011): release date, model numbers and price

    Apple released the iMac 21.5" (Mid 2011) on May 3, 2011, 15 years ago at $1,199. Its model number is A1311 (identifier iMac12,1). Apple stopped selling it on October 23, 2012. It gets updates up to macOS 10.13 (High Sierra). No refurbished offer right now; the lowest price we have seen is $129.

    Updated October 31, 2026. Release date and launch price from Apple. Refurbished prices checked daily at Mac of All Trades, Amazon, Back Market, Gazelle, Apple Store, and eBay.

    Released
    May 3, 2011 15 years ago
    Launch price
    $1,199 For the 256GB model
    Discontinued
    October 23, 2012 539 days on sale
    Latest software
    macOS 10.13 (High Sierra)
    Model number
    A1311 Identifier iMac12,1
    Storage
    256GB, 500GB, 1TB, 2TB
    Colors
    Silver
    First refurbished
    June 25, 2011 Apple Store, 54 days after launch

    Refurbished iMac 21.5" (Mid 2011) prices

    Today's cheapest refurbished offer for each configuration, with the lowest price RefurbMe has recorded below it.

    Color
    256GB
    500GB
    1TB
    2TB
    Silver 0 of 4 in stock
    Alert me lowest seen $427 Alert me lowest seen $129 Alert me lowest seen $219 Alert me lowest seen $249
    0 of 4 configurations in stock. Grade and battery vary by offer; the deals page lists every one.

    Where to buy a refurbished iMac 21.5" (Mid 2011)

    Every refurbisher that has sold the iMac 21.5" (Mid 2011), cheapest today first. Listings counts the offers each one has live, one per version and grade, not how many devices it holds.

    Refurbisher Cheapest today Listings Lowest seen First sold refurbished Offers
    Mac of All Trades 0 listings
    		 Sold out 0 $129 Sep 1, 2016 (1949 days) Get an alert
    Back Market 0 listings
    		 Sold out 0 $189 Jul 12, 2018 (2627 days) Get an alert
    eBay 0 listings
    		 Sold out 0 $189 Jun 26, 2026 (5534 days) Get an alert
    Amazon 0 listings
    		 Sold out 0 $300 Aug 20, 2018 (2666 days) Get an alert
    Apple Store 0 listings
    		 Sold out 0 $799 Jun 25, 2011 (54 days) Get an alert

    The iMac 21.5" (Mid 2011) so far

    Launched 15 years ago.

    ReleasedMay 3, 2011
    $1,199 at launch     First refurbishedJun 25, 2011
    Apple Store, after 54 days     DiscontinuedOct 23, 2012
    539 days on sale     TodayOct 31, 2026
    No refurbished offer right now.
    1. Released, May 3, 2011$1,199 at launch
    2. First refurbished, Jun 25, 2011Apple Store, after 54 days
    3. Discontinued, Oct 23, 2012539 days on sale
    4. Today, Oct 31, 2026No refurbished offer right now.

    Every iMac 21.5" (Mid 2011) part number

    2 part numbers in the US, one per configuration. You'll find yours on the back of the box and in the device's settings, next to the model number.

    Part number Model Version Today Lowest seen
    256GB6 part numbers
    MC812 custom A1311 SSD · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 16GB none
    MC812 custom A1311 SSD · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 4GB none
    MC812 custom A1311 SSD · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 8GB none $427
    MC812 custom A1311 SSD · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 16GB none
    MC812 custom A1311 SSD · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 4GB none
    MC812 custom A1311 SSD · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 8GB none $799
    500GB2 part numbers
    MC309 custom A1311 Hard Drive · Silver · 2.5Ghz Intel Quad-Core i5 2nd gen · 4GB none $129
    MC309 custom A1311 Hard Drive · Silver · 2.5Ghz Intel Quad-Core i5 2nd gen · 8GB none $139
    1TB6 part numbers
    MC812 custom A1311 Hard Drive · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 16GB none $250
    MC812 custom A1311 Hard Drive · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 4GB none $299
    MC812 custom A1311 Hard Drive · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 8GB none $219
    MC812 custom A1311 Hard Drive · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 16GB none $299
    MC812 custom A1311 Hard Drive · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 4GB none $259
    MC812 custom A1311 Hard Drive · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 8GB none $272
    2TB6 part numbers
    MC812 custom A1311 Hard Drive · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 16GB none $289
    MC812 custom A1311 Hard Drive · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 4GB none
    MC812 custom A1311 Hard Drive · Silver · 2.7Ghz Intel Quad-Core i5 2nd gen · 8GB none $249
    MC812 custom A1311 Hard Drive · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 16GB none
    MC812 custom A1311 Hard Drive · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 4GB none
    MC812 custom A1311 Hard Drive · Silver · 2.8Ghz Intel Quad-Core i7 2nd gen · 8GB none $499

    iMac 21.5" (Mid 2011) questions

    When did the iMac 21.5" (Mid 2011) come out?

    Apple released the iMac 21.5" (Mid 2011) on May 3, 2011, 15 years ago at $1,199.

    How much did the iMac 21.5" (Mid 2011) cost at launch?

    $1,199 for the base model.

    What is the iMac 21.5" (Mid 2011) model number?

    Its model number is A1311 (identifier iMac12,1). The model number starts with A. It is printed on the device or its box, and most devices also show it in their settings.

    Is the iMac 21.5" (Mid 2011) still supported?

    It gets updates up to macOS 10.13 (High Sierra); newer models run later versions.

    When was the iMac 21.5" (Mid 2011) discontinued?

    Apple stopped selling it on October 23, 2012.

    How much is a refurbished iMac 21.5" (Mid 2011)?

    There is no refurbished offer right now. The lowest price RefurbMe has seen is $129.

    How we get these numbers

    Release dates, launch prices and model numbers come from Apple. Every day RefurbMe checks the stock and prices of Mac of All Trades, Amazon, Back Market, Gazelle, Apple Store, and eBay and keeps every price it sees, which is where the lowest price seen comes from. The cheapest price today is the lowest in stock at our last check; it can change between that check and your visit.

    Other iMac models from 2011

    All iMac release dates