
But if you have more fortitude than I you could try exchanging the RAM or getting a refund and trying another brand.

And perhaps another manufacturers RAM would work fine. Or two, that the RAM Crucial has provided you is defective in some way (doubtful from your testing scenario) or just incompatible with your particular iMac. One, that your particular iMac does not support the amount of RAM you wish to install, PERIOD. In this particular case there are two possibilities. And you are one of the 'lucky' few experiencing an edge case where manufacturing tolerances have conspired to make your iMac one of the unlucky few that don't support more than Apple's Officially Supported specification.

There are likely technical reasons why certain Macs only support up to a certain amount of RAM. So putting more RAM in a system that will reportedly work with more than officially supported is not much more than "my cousin Jane put more than the supported amount of RAM in her 2009 iMac and it worked fine."Īpple likely did not set the maximum RAM supported arbitrarily. In some models perhaps a lot more than one. The "supposed to handle" comes from at least one person reporting that more than the supported amount of RAM worked fine on their Mac. Now guessing Apple's motivations is generally discouraged here (and celebrated elsewhere.), it is not a stretch to extrapolate why. Ive done some googling and apparently this means there is an issue with the RAM. Apple supports up to a specific amount of RAM in upgradable Macs. My 2012 cMBP will sometimes not boot up and it instead does the 3 beeps thing, or freeze while im using it and do the 3 beeps thing when I try to boot it up after it freezes. Your comment of "supposed to handle" is key here.
