Don't do anything with the drive! As you likely have a bad drive cable.
Take the drive out of the system and try connecting it externally via a SATA to USB adapter cable like this one: [https://www.startech.com/HDD/Adapters/USB-3-SATA-adapter-cable-with-UASP~USB3S2SAT3CB|Startech 2.5" SATA to USB adapter] If the system boot up you've proven the issue is the cable.
Even still, the drive may have corruptions due to the bad cable so it may not boot up. You'll need to create a fresh startup drive to then salvage your files as well as fix your current drive. If you have access to another Mac system you can create a bootable USB thumb drive to boot up your system to check your drive.
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As to the cable Apple has been quietly replacing them for free. Visit an Apple Store or an Apple authorized service center to have them replace it. If you just can't get to either here is the guide you'll need to follow: [guide|10379|MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement].
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As to the cable, Apple has been quietly replacing them for free! Visit an Apple Store or an Apple authorized service center to have them replace it.
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This is a very common issue with this series.
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If you just can't get to either here is the guide you'll need to follow & the part info: [guide|10379|MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement].
Don't do anything with the drive! As you likely have a bad drive cable.
Take the drive out of the system and try connecting it externally via a SATA to USB adapter cable like this one: [https://www.startech.com/HDD/Adapters/USB-3-SATA-adapter-cable-with-UASP~USB3S2SAT3CB|Startech 2.5" SATA to USB adapter] If the system boot up you've proven the issue is the cable.
-
Even still the drive may have corruptions due to the bad cable so it may not boot up. You'll need to create a fresh startup drive to then salvage your files as well as fix your current drive. If you have access to another Mac system you can create a bootable USB thumb drive to boot up your system to check your drive.
+
Even still, the drive may have corruptions due to the bad cable so it may not boot up. You'll need to create a fresh startup drive to then salvage your files as well as fix your current drive. If you have access to another Mac system you can create a bootable USB thumb drive to boot up your system to check your drive.
As to the cable Apple has been quietly replacing them for free. Visit an Apple Store or an Apple authorized service center to have them replace it. If you just can't get to either here is the guide you'll need to follow: [guide|10379|MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement].
'''HOLD EVERYTHING HERE!'''
Don't do anything with the drive! As you likely have a bad drive cable.
Take the drive out of the system and try connecting it externally via a SATA to USB adapter cable like this one: [https://www.startech.com/HDD/Adapters/USB-3-SATA-adapter-cable-with-UASP~USB3S2SAT3CB|Startech 2.5" SATA to USB adapter] If the system boot up you've proven the issue is the cable.
Even still the drive may have corruptions due to the bad cable so it may not boot up. You'll need to create a fresh startup drive to then salvage your files as well as fix your current drive. If you have access to another Mac system you can create a bootable USB thumb drive to boot up your system to check your drive.
As to the cable Apple has been quietly replacing them for free. Visit an Apple Store or an Apple authorized service center to have them replace it. If you just can't get to either here is the guide you'll need to follow: [guide|10379|MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement].