“32g's of ram into my 2013 imac all working like a dream. To be honest it took me a lot of shuffling between slots and a graduated upgrade approach to get it to recognise, but I stuck with it and after about an hour of troubleshooting it's done. Computer boots up every time now with no ram error messages. It did have me wondering there for a while, hence only 4 stars..
Thanks for the ram jam”