The 27-inch iMac has a rear door below the power cable to add or change the installed RAM. Users can upgrade the RAM up to 128GB and use cheaper third-party solutions. Internal storage is fixed to ...

For whatever reason, Apple decided to make RAM upgrades much tougher on the smaller iMac. While the 27-inch model was much the same as it had been, the 21.5-inch model required almost total ...