Kapton tape amazon1/15/2024 ![]() IFixit guide for Adhesive strips application ![]() It does not mater which NVMe drive you use, except the 01.2019 released Samsung 970 Evo Plus which is not compatible with any of the adapters, so do NOT use it unless a new adapter is released. Using an AHCI blade will never give you hibernation issues, though those are very limited and no longer manufactured. Kapton Tape to cover the exposed Adapter pins (~€4) - see IMPORTANT NOTE belowįor the blade SSD upgrade it does not matter which of the three adapters you use ( first, second, third), or if it is sold on ebay, amazon, or wherever else, or if it is branded as Sintech or Kalea or whatever else, they are all the same. a compatiable intel CPU from the same generation as the original a small screw to hold the new blade drive on place (it is missing on HDD-only models) OWC thermal sensor (€40) (most likely NOT required!) plastic card opening tool (€1) (optional) The tools you are going to need are color coded as follows: all, HDD, Blade, CPU. ![]() Perhaps, the newest OS X firmware has eliminated the issue so the temperature control no longer triggers the fan to spin at max rpm in the slim iMac models. Regarding the HDD upgrade, almost all (if not all) of the reports for upgrades on 27" iMacs Late 2012 and newer, the OWC's temperature sensor is NOT needed! On older models there would be the fan-spinning-on-max-rpm issue. ![]() (for the models in blue, alternatively, instead of standby 0, you can leave the standby at 1, and use for example standbydelayhigh 2592000 which equals to one month in seconds) Until Apple patches the bootrom with the full NVMe driver that 20 iMac models have, the only way to prevent your iMac from crashing is type the following command in Terminal:įor Late 2015 iMacs (disabling normal sleep) -> sudo pmset -a hibernatemode 25 standby 0įor Late 2012 until Mid 2015 iMacs (disabling hibernation) -> sudo pmset -a hibernatemode 0 standby 0 autopoweroff 0 The iMac models marked in ORANGE will either "restart because of a problem", or show a folder with question mark icon (depending on the system event produced). The iMacs above marked in BLUE will crash when waking from hibernation, self restart with two start-up chimes. The iMacs before 2017 have issues with the drive's power states after upgrading the blade SSD with a non-Apple NVMe. Late 2015 - 17.1 - none (4.0Ghz i7-6700K, Fusion HDD+24GB blade / Fusion HDD+128GB blade / blade only) Here is a list of all 27" iMac models subjected in this thread: Here you can find and discuss all the collected knowledge regarding upgrading the HDD, blade SSD and CPU of a 27" iMac 2012-2019, as well as a list of performed upgrades.
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