Hi Severin,

If your iMac is  21.5" Model A1311 or 27" A1312  you can use a Phillips #2 
screwdriver to loosen the three captive screws on the memory access door.
TURN them COUNTERCLOCKWISE
Then remove the memory access door and set it aside.

Cheers,
Ronni

Sent from Ronni's iPad4


> On 25 Jun 2014, at 2:08 pm, Severin Crisp <[email protected]> wrote:
> 
> I have a Late 2011 iMac 12,1 and have purchased modules to go from 8GB to 
> 24GB ( thanks Daniel).  Today I duly shut down, unplugged everything from the 
> back (including a struggle as always with the ethernet plug) and laid the Mac 
> out flat on a towel.  Various of the online “how tos” list the simple 
> procedure starting with a Phillips screwdriver to undo the three small screws 
> that secure the cover.  But not so easy.  I have several Phillips 
> screwdrivers which look as if they are correct but do not catch.  Closer 
> inspection shows that the screwheads have only a shallow indent so a normal 
> Phillips, which has a bit of an extended point, does not apparently go in far 
> enough to engage.  Not wishing to damage screwheads I put it all back again 
> and still have 2 x 8GB sitting on the desk looking at me expectantly.  Has 
> anyone else tried to follow this seemingly straightforward operation and had, 
> or not had, similar problems?  Are they really Phillips screws or something 
> that just looks like them?  I have had similar situations in the past.  
> Advice please!  
> Severin Crisp
> 
> ____________________________________________________
> 
>              Assoc Prof R Severin Crisp, FAIP, FIP, CPhys
> 15 Thomas St, Mount Clarence, Albany, 6330, Western Australia
>                   ph (08) 9842 1950 ( Int'l +61 8 9842 1950)
>                            mail to: [email protected]
> ____________________________________________________
> 
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