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I thought I read somewhere that the maximum Ram can be as much as 32 MB. Is that correct?

It’s according to which machine you have. There are four EMC 2390s See them here: http://www.everymac.com/ultimate-mac-loo… RAM Type: PC3-10600 DDR3 Min. RAM Speed: 1333 MHz Details: Supports 1333 MHz PC3-10600 DDR3 SO-DIMMs (204-pin). Standard RAM: 4 GB Maximum RAM: 16 GB Details: By default, 4 GB of RAM is installed as two 2 GB SO-DIMM modules. Two slots free. http://www.everymac.com/systems/apple/im… RAM Type: PC3-10600 DDR3 Min. RAM Speed: 1333 MHz Details: Supports 1333 MHz PC3-10600 DDR3 SO-DIMMs (204-pin). Also see: How do you upgrade the RAM in this Aluminum iMac model? How much RAM does it actually support? Standard RAM: 4 GB Maximum RAM: 32 GB* Details: By default, 4 GB of RAM is installed as two 2 GB SO-DIMM modules.