Timetec Hynix IC Apple 32GB Kit (4x8GB) DDR3L PC3L-14900 1866MHz for iMac 17,1 w/Retina 5K display (27-inch Late 2015) A1419 (EMC 2834) MK462LL/A, MK472LL/A, MK482LL/A (32GB Kit (4x8GB))

Received as per specification and installed today itself and works perfect. will give more detailed review after sometimes if time permits.

Hi, i have installed this memory module & the bus speed is 1600MHz instead of 1867 / 1866. Tried different ways. - Only these memory modules - combined with original 1867MHz - Single Module - 2 modules or even 4 also In this way i can say the product is not same as advertised. If there is any work around (like reset) please let me know.

I had bought this and installed in my IMAC and since hen every few days teh computer crashes, i took my computer to apple support who informed me that computer is crashing as memory is defective. i installed my old memory chips and computer works fine. This is clearly a defective product and Amazon should not be selling such items from such vendors. I would like to return this and get a refund.

I've happily upgraded another iMac with Timetec memory without issues. After lots of research for a late 2015 27", I settled on Timetec again. Did you know...this iMac model supports a maximum 64GB upgrade, beyond the 32GB maximum Apple suggests. There's just one issue: that requires 16GB DDR3 modules, and those are RARE. Like, in extremely short supply. Accordingly, they're cost-prohibitive. A 32GB kit was the next-best option. My late 2015 is a bit fickle with memory installation. I noticed it was being temperamental even when removing and reinstalling the original modules. So if you notice the dreaded beep when you attempt to boot upon first installation, it's possibly not the fault of these upgraded modules. When installing the 32GB kit, it took me a re-seating or two before it booted. Since then, it's been working flawlessly without issues. The additional memory brings much-needed extra performance to this computer...now I've just got to replace that darn Fusion Drive with a proper SSD 😬

Works perfectly with my iMac 27 inch 5K Late 2015. Was able to max out 32 GB of RAM

I got this Timetec RAM kit to upgrade my friend's iMac, and so far he's been using it for 5 months with no issues! 32GB was plenty for him, and I wanted to populate all four slots, so I went with this kit. The install was super easy from the rear access panel, under the hinge. It's very intuitive and only took a few minutes to install them. I trust Timetec because I've been using a 16GB kit in my home server for the last 7 years with no issues. Overall, these are a great value and excellent performance.

16GBから32GBへ丸ごと4枚を使いましたが、それほどの違いは実感できませんでした（気付かないだけなのか判りませんが）もっと劇的な変化を期待してしまいましたので、ちょっと残念な気持ちは若干感じています。

Plug in and play....a perfect upgrade