Hope other people keep pushing it and I may try again in the future. I got farther than I thought I would and getting the Imac to even boot with it was neat.
LATE 2013 IMAC 27 UPGRADE MEMORY UPDATE
Maybe with 10.16 coming later this year there will be another bootrom update and maybe these High capacity chips will work in older 2013 Imacs. There may be more compatibility with the Haswell Cpu's, Don't know till we try? It would be interesting to try the same chip 16gb DDR3L 1600 chip on a 2014 or mid 2015 Imac.
LATE 2013 IMAC 27 UPGRADE MEMORY MAC OS X
Mac OS X 10.0, was released in March 2001, with its first update, 10.1. It is the primary operating system for Apples Mac computers. You can upgrade your Apple iMac 21.5-Inch (Late 2013) Computer to up to a maximum memory capacity of 16GB Memory. One thing I haven't tried is running it with Win10, and at this point I won't since I've played with this enough and these chips are going back in the mail before I brick my wife's Imac, but if somebody were to run Win10 and see if it's a MacOs limitation or Hardware compatibility that would be another clue. macOS is a Unix operating system developed and marketed by Apple Inc. If this machine was purchased without an NVMe drive - if I open it up will the slot for NVMe still be. At 51C, but that shouldn't be effecting the system. CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple iMac Core I5 3. Hey there, got a iMac I want to upgrade a little bit and have a few questions I can't find completely solid answers to.
I checked the Dimm temp's and the 16gb chips do run a bit hotter than the 8gb chips. So at some point there is a degree of the CPU recognizing the Large ram chips but it's not able read from them entirely correct. SODIMM Memory Ram Upgrade Compatible with Apple Imac Core I5 3.4 27-Inch (Late 2013) Me089Ll/A - A6. I tried running it with 10.15.4 and it's still unstable. Newegg.ca offers the best prices on Mac Memory, Macintosh Memory, Memory for Apple Notebook, RAM Upgrade for Apple Notebook with fast shipping and top-rated.
Unfortunately today after a few hours I got Kernel panics with it in 10.14.6.