4 Replies Latest reply: May 23, 2013 12:48 AM by LexSchellings
georgios Level 1 (0 points)

Hi everybody ... I am in desperate need of help,concerning the replacement drive! All I find on Amazon,for example,are SATA III drives,and my iMac,being quite old,has SATA I,I suppose?! My question is ... will my machine recognize the SATA III drive,once installed??? I know that the connectors are identical to all SATAs but,since the replacement procedure is quite complicated,I beg you to,at least,tell me if I have to do something prior to the replacement?

I've read somewhere that one should reduce the thoughput from 6 to 3 GB/sec,or something like that,whith some jumpers,but all that is alien to me!!!

I am pressed by work and deadlines,so I would appreciate immencely any feedback!!!


Thanx in advance,




Just for info,I am looking at a WD Caviar Green 1TB SATA III ... ???

  • MichelPM Level 6 (11,428 points)

    If you have never worked on a Mac or iMac before, my advice would to take this into an Apple store or an Apple authorized service center and have them install the proper hard drive for you, instead of you doing this yourself and risk "bricking" your iMac.

    Get an estimate of cost and just have certified Apple Tech do the installation. I shouldn't take long for them to do this.

  • MichelPM Level 6 (11,428 points)

    The reason I advise having this done by Apple service techs is if you open this iMac up and work on it yourself and you fail to get your iMac working again, you will not be able to bring to Apple, directly, any longer. They will not do the repairs or installations needed to your iMac. You will be forced to take it to a third party Apple authorized service center for repairs from now on if you attempt to do this drive replacement, yourself.

    Tearing down and reassembling an iMac is not for a "newbie" or novice computer user/ upgrader.

    iMacs do not have any easily serviceable or user upgradeable parts inside.

    I have a lot of Mac upgrading experience and the newer flat style  iMacs (and the much older eMacs) are about the only Macs I will not attempt to try and work on.

    Too many screws and screw sizes. Too many really fiddly and fragile connections. Just too many variables of things that can either break or forget or hook up improperly. The 2005 and newer flat screen style generations of iMacs are just complicated and finicky puzzles to work on.

  • georgios Level 1 (0 points)

    Thanks a lot MichelPM for the wise advice!!! I am aware of the risks involved,I really am!But I have dealt with fiddly connections inside my Macs,at home,since my Power PC 8100,back in the 90s.I am,by no means, an Apple Tech,but I do have enough structure,memory and nerves to pull this off.Besides,it's my only solution cuz the prices of Mac sevice in SouthWest France(where I live) are deadly,insanely unreasonable. So,yes,I will have to take care not ot ''brick'' my Imac,as you say.

    But,my question really was do I have to change any jumpers on a SATA III drive before I install it.Or anything else ... ??? I can't find anywhere a SATA I or II drives? You could,perhaps,if you have the time,recommend a particular model to me( I'm not after huge capacities,cuz I have external FW800 drives for storage) but 500GB,750GB or the like.1TB max.My iMac model is MA878LL (24'',Mid 2007).


    I would be most grateful,



  • LexSchellings Level 6 (8,789 points)

    Your iMac has Sata2 (3GB/s). New HDD are compatible with that. WD disks not the most easy on the Mac, I would take one offered by OWC.

    But I suggest you follow Michel's advice and let Apple put it in, it is not much more expensive and doesn't have the risk that you "brick" the iMac.