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모델 A1278, 2012년 6월 출시. Turbo Boost가있는 Intel 프로세서, 최대 512 MB DDR5 비디오 RAM

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After replacing HHD to SSD, Flashing problem accures

After replacing Hard drive folder with question mark and not recognize it

Hi,

I have a mid 2012 macbook pro (OSX 10.12.5). Just bought my new Samsung 850 Pro 256gb SSD disc and want to replace with existing HDD. Tried out several methods:

I placed my SSD in an external box, connect it through USB- formated everything - Journaled + GUID.

1) Changed the ribbon cable, the result is the same. To be 100% sure , I bought another SSD with Intel logo on, same the result.

2) Cloning old hard drive to new - then I replaced it and I got flashing folder. Tried resting PRAM (cmd+option+P+R) - still the same. It did not even recognize it.

3) I placed the SSD inside my Mac- Then I tried to install from internet - opened Disk Utility - Here it doesn't show me the hard drive- sometimes it does, but it doesn't allow me to do anything with.

4) Thought maybe the cable is broken, but when i reconnect the old hard drive, everyhting works perfectly. Only when I connect the SSD nothing works. If I connect my new SSD through USB, it starts loading to boot, but suddenly a prohibition sign appears, then I disconnect the cable by removing it from the USB plugin, and immiatly reconnect it, the boot loading restarts and I can use my Mac without any problems.

Can anyone please help me ?

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가장 유용한 답변

Do an internet install, here's how:

http://osxdaily.com/2014/12/14/reinstall...

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I've tried those methods, but as I mentioned before, the disc doesn't appear to make an installation on.

의 답변

Reformat the drive using the "write zeros" option with Disk Utility.

의 답변

Will you please explain what "write zero" is and how I can using it?

의 답변

It's an option when formatting. There's an options box that needs to be opened when selecting your format.

See step #3 here:

https://support.apple.com/kb/PH22241?loc...

의 답변

If "write zero" means securely erasing of the disc, then I've already done it. I chose "Most secure" option when I was erasing my SSD.

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