Anyway, it's working, still seeing the 4GB after multiple reboots, so I just hope it stays that way. Since multiple re insertions hadn't fixed it, I don't suspect dirty/corroded contacts, but just the slightest misalignment of contacts on the stick such that stick movement was required to mate with the slot contact. Anyway, after various attempts at applying pressure along the bottom stick's long edge by twisting a small screwdriver (which never seemed to move the stick further into the slot), or trying to slide the stick slightly parallel to the long edge (not into the slot) in both directions (it only moved very slightly) got it working (don't remember which direction was the best (up or down)). Seems the new sticks are slightly thinner, but comparing the original and new visually doesn't immediately suggest that. In the bottom slot, the original stick has a minimal snap, but the new stick has none. In the top, either original or new card kind of snaps in. It seemed that in the bottom slot, I don't get as much insertion resistance as in the top slot.

I tried various combinations of reinsertion and also saw that either new stick in the bottom slot beeped. I ended up buying a single 8GB memory card with the intention of just using it alone in one slot but my colleague fitted it along side one of the 4GB cards and this has worked fine since as a total of 12GB. Either of the original sticks work in the bottom slot. The Crucial pair also worked fine as a pair in the second Mac mini. Either of the new ones in the bottom slot (assuming this has been called slot 0) elicited the beeping sound every 3 seconds or so. I wanted to replace the 2 original 1GB Samsung sticks with 2GB sticks from OWC.

Hope this helps cause it helped me tremendously after wanting to pull my hair out.Īn overall 'me too'. Its definitely a hardware issue and the seating of the memory in slot 0. Do the same procedure with the screwdriver and they both work again. When i take out the memory and put it back in normally i get the beeps again. I did this and tested out both sets of memory and now they both work. Take a small flat head screwdriver and after you put the memory in slot 0, put the screwdriver between the top of the mac mini and the memory then turn the screwdriver a little to exert pressure on the memory into the slot. What i did was what another thread advised to do. They both worked in slot 1 alone but nothing when in slot 0.

I went through 2 brands of memory both had similar problems when seated into slot 0. Read on a thread it was how certain memory gets seated into slot 0 that causes it not to work. When i tried the old memory or just slot 1 then everything worked. It was always slot 0 that had issues of need reading the memory. I had the same problem as you on my mac mini.

Crucial memory for mac mini 2012