Replace RAM memory in a 21.5 inch Late 2015 iMac

If you take it to Apple and they find it to be defective, they can replace it, but the cost will be rather expensive since it is glued to the logic board.

FWIW, RAM usually does not deteriorate "old aging RAM". So, are you sure it is the RAM or is there a problem with your hard drive (storage/memory)?

Hi ktrieu,

No. RAM is not upgradable by you or any company on a 2015 21.5 iMac.

Cheers,

Jack

No. It is not accessible. What is wrong with it?