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You're not gona like the answer but no one but Apple knows, but I'm guessing early Q2 2012.
 
Well the last 5 releases have been in different months:

2011 - May
2010 - July
2009 - October
2009 - March
2008 - April

So maybe for 2012... June or August? Depends a lot on Intel though.
 
It's up to Intel as to when to release Ivy Bridge chips. I'm guessing after June 2012.

Latest estimates on CPU release indicate April. Apple has been known to take a month or two (or three) to release a product after the CPU releases - but they've also been known to get EARLY access, too. So it could be anywhere from March to June.
 
Well the last 5 releases have been in different months:

2011 - May
2010 - July
2009 - October
2009 - March
2008 - April

So maybe for 2012... June or August? Depends a lot on Intel though.

Based on these trends (and excluding March 09 to Oct 09), they've released new iMacs every 9 to 11 months.

So February March or April 2012 is plausible. That's also assuming Intel is on schedule.
 
Based on these trends (and excluding March 09 to Oct 09), they've released new iMacs every 9 to 11 months.

So February March or April 2012 is plausible. That's also assuming Intel is on schedule.

Thats what I was thinking. I don't think Intel is on schedule though.
 
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