iMac upgrade to i7-2600k with 10.9

Discussion in 'iMac' started by Maila87, Feb 1, 2014.

  1. Maila87 macrumors member

    Jan 2, 2010
    Hi, I tried to upgrade the iMac with i7-2600k like I read. Just my boot stuct and won't pass me to OS. Any suggestions please?
  2. biohead macrumors 6502

    Jun 18, 2010
    West Drayton, UK
    Need a bit more information than what... what model iMac do you have? Size and Year?
  3. mrsavage1 macrumors regular

    Feb 1, 2010
    The 2011 imac can't take the k series.
  4. Bear macrumors G3

    Jul 23, 2002
    Sol III - Terra
    The i7-2600S is what Apple provided as an option for the Mid 2011 21.5" iMacs. See this thread for more information: 21.5 mid2011 iMac CPU Upgrade.
  5. Maila87 thread starter macrumors member

    Jan 2, 2010
    My model is 27" with mid-2011 with i5 3100 MHz.
  6. andycho7 macrumors member

    Dec 2, 2013
    for 21 inch model BTO - i7-2600S

    for 27 inch model BTO - i7-2600
    No S or K. Just 2600 for 27 inch model.
  7. RedReplicant macrumors 6502a

    Mar 31, 2010
    In 10.9 they started checking CPUs and it won't boot without a CPU that was actually released for that model / release cycle.
  8. Chippy99 macrumors 6502a

    Apr 28, 2012
    WOW, I didn't know that. That's going to be a whole load of pain for Macintosh owners, and also people who might have one day upgraded their Mac's CPU.
  9. Maila87 thread starter macrumors member

    Jan 2, 2010
    Is there any solution for hacking supporrted processors list?
  10. matthiaswitt macrumors newbie

    May 28, 2014
    I had Success with 2600k, mavericks imac

    I also installed a 2600k in my imac 27 2011. It is running OS X Mavericks and had kernel panic etc. on startup. There was one way to start the imac (it works only sometimes):

    Turn off by holding the power button,
    trun on by pushing the power button once,
    do a nvram/pram reset by holding the keys cmd, option(alt),p,r until you hear the startup sound a second time,
    immediatly hold the shift key to start up in safe mode.
    after that the imac sometimes did boot into maverics.

    when you are in maverics (try it multiple times):

    I had refit installed on my mac, but i think this is not neccessary.

    download multibeast (6.3) for mavericks ( under drivers select system, patchedAppleIntelCPUPowermanagement, os x 10.9.0.
    select build and install on your primary hard drive/ssd.

    After that my mac boots up normally.

    i hope it is useful for you...

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