On Oct 9, 2012, at 10:45 PM, ValterV wrote:

> Hi all! 
> I just joined this group, because I'm pondering about getting an used Intel 
> iMac (replacing a PM G5 DP 2.7), and I need your expertise. :-)
> 
> I am interested in the 24" models, but I did a little Googling and it seems 
> the 24" models were problematic:
> - Googling "imac 24 problems" gives almost 32M results
> - Typing "20" instead of "24", it gives 61M results
> - With "21.5" it gives a little over 1M
> - With "27", 14M.
> 
> Does it mean the 24" iMacs were quite troublesome? 

> Basing on these figures, the 24" seems the worst model, besides the 20" model 
> (but the 20" could have been sold way more); and the 21.5" seems the less 
> troublesome (or the least sold, but It doesn't seem likely).

> The 21.5" model would be my second choice, if the 24" isn't much realiable 
> (processor speed would always be more than my G5, so it's not an issue).
> 

No, you have no sound basis in the data you offer for making those statements.

If your aim is to determine hardware reliability the results you got are 
meaningless, since things like "I just got a new 24" iMac, and now I have a 
problem, my wife wants one too!" and "I had a problem installing Photoshop on 
my 24" iMac" would count. There is also the 'Squeaky Wheel' syndrome: 
Complaints beget 'Me Too!' postings and so complaints outnumber positives. It 
includes issues like problem with video drivers or system updates which do not 
relate at all to hardware reliability

Finally we do not know how many of which size Apple's sold over the 
years...anecdotal evidence would indicate that more 24 and 27" models have been 
sold all told.

> Since I'm going to buy a relatively old machine, I would like to know in 
> advance if I'm getting into likely trouble.
> I'm somehow good with hardware and troubleshooting, but opening the iMacs is 
> no piece of cake, so I try to avoid it as much as I can.
> I heard several times about bad capacitors' fault in iMacs, but I don't know 
> if they happen in every iMac model or just in some.


The capacitor plague was confined entirely to G5 iMac models. 

In my experience, the Intel-based iMacs have been remarkably reliable, none of 
the numerous ones installed here have needed servicing, and the 24" one is by 
far the most popular, followed closely by the 27" model.

Also, working on the newer aluminum intel iMacs (you want to avoid any white 
iMac models as they're obsolete now, with poor performance and low memory 
ceilings) isn't actually that hard, provided you get the right tool to remove 
the glass screen. (which is available at Home Depot, since it's just a 
suction-cup tool for handling panes of glass)

-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs


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