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モデル番号A1502/2.6GHz(Turbo Boost使用時最大3.1GHz)もしくは2.8GHzTurbo Boost使用時最大3.3GHz)デュアルコアIntel Core i7、4MB共有L3キャッシュに変更可能

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Turns off randomly when inactive & twice chime sound when turning on

I recently changed my SSD hard disk (according to instructions on Ifixit), to the respective OWC model, since my old one was failing more often than not. At the same time I upgraded to Mojave 10.14.6.

Ever since my computer turns off randomly, but always only when sleeping/ inactive and once I turn it back on, it does not only take about 5 times longer than before, but it actually does the chime sound twice until the apple logo shows up, so it seems to turn on twice in a row.

Otherwise it seems to run fine (apart from heating up quite a bit, but it did that before too).

Thanks in advance for any advice!

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Check with OWC to see if your drives firmware is upto date.

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“Compatible” flash drives are known to possibly give issues with sleep/hibernate on Macs of 2013/2014 years. The only workaround I know of is to disable hibernating through a set of terminal instructions. Normal sleep mode has a slightly higher energy consumption compared to hibernation but it would be worth a try to solve your issues. Or just replace your drive with an original one and everything should get back to normal.

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Jay Dee さん、ありがとうございました!
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