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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