Click the Apple logo top left of the screen. From the drop down menu choose "About This Mac". Click "More Info". The page that comes up will contain the serial #.
most likely in the about this mac section
imac 27 inch, macbook pro, and macbook air.
There is no 24" iMac for sale new. Your choices are 21.5" or 27".
As of this writing, the 3.5 GHz 27-inch iMac (with a 5K display) retails for $2,499 USD.
The 27 inch iMac is 20.4 inches (51.7 cm) tall and the 21.5 inch iMac is 17.75 inches (45.1 cm) tall.
21 pounds
Yes, with no problem.
The IMac 27 inch all in one, but it is pricey
Apple no longer sells the 24" iMac. Your choice is 21.5" or 27". You can see prices and options on the Apple store online. Click the link.
You can with a program called TG Pro from Tunabelly Software.
iMac 27" far and away.
The iMac comes in two different screen sizes. Customers can choose from the smaller 21.5 inch screen or the larger 27 inch screen. Both options are available ion their website.
Early 2008, Intel Core 2 Duo, AliMac 2.4GHz Intel Core 2 Duo 20-inch (Al)iMac 2.66GHz Intel Core 2 Duo 20-inch (Al)iMac 2.8GHz Intel Core 2 Duo 24-inch (Al)Early 2009, Intel Core 2 Duo, AliMac 2.66GHz Intel Core 2 Duo 20-inch (Al)iMac 2.66GHz Intel Core 2 Duo 24-inch (Al)iMac 2.93GHz Intel Core 2 Duo 24-inch (Al)iMac 3.06GHz Intel Core 2 Duo 24-inch (Al)Mid 2009, Education Institutions OnlyiMac 2.0GHz Intel Core 2 Duo 20-inch (Al)* Design: Edge-to-edge glass/seamless enclosure debutLate 2009, Core i5/i7 quad-core processors availableiMac 3.06GHz Intel Core 2 Duo 21.5-inch (Al 16:9)iMac 3.06GHz Intel Core 2 Duo 21.5-inch (Al 16:9)iMac 3.06GHz Intel Core 2 Duo 27-inch (Al 16:9)iMac 2.66GHz Intel Core i5 27-inch (Al 16:9)