Chosen Solution
My problem is that the mac does not recognize the ssd. Sometimes yes, and sometimes no. In the apple support they told me that it was the ssd and that I lost everything cause it was all damaged. Even that, I’ve been capable of saving everything because the mac recogized again the ssd. After that I changed the sdd but the problem still remains. Sometimes the mac recognize the disk and I reinstall the Macos and everything seems fine. But then, stops working and does not recognize the ssd again. How to solve the problem of my MacBook? Thank you for your answer anyway!
Let’s give this a try setup an external bootable drive (something you can use for awhile) Ideally a thunderbolt drive like: Samsung X5. Now we need to make it the boot drive go into your preferences > Startup Disk. Now restart your system with the external connected it should now be the first listed drive on your desktop. Migrate your apps & stuff over and use your system this way for a week or so. Is it stable or still failing? Let us know!
Just restart with the Control + Option + Shift + Power button. Then press Option and wait a bit till you see the drive / or not ))) If not - your drive is out of order and Apple have a replacement program for 128 and 256 Mb drives for A1708. If you see the drive then, my guess, you’ve cloned the drive and somewhere in the middle restarted from the source drive which screw the internal structure of the cloned and now internal drive. You can just restart with the Control + Option + Shift + Power button and it will boot without problem nor you need to push the option key again - it will boot just fine. Most probably after the next shutdown situation will repeat itself but just reboot with those keys and continue. Please refer to https://youtu.be/phKQ9U6QkxU for illustration purposes. Or reformat and reinstall everything from the scratch.
