MacBook Pro won't boot into OS after running usually slowSo today for some reason my MacBook Pro (Mid-2012) 13" 8GB RAM/Samsung SSD ran unusually slow when I first powered on. To the...
Answer to: MacBook Pro won't boot into OS after running usually slowTurns out I fell prey to the TRIM bug my hard drive (Samsung 850 SSD) was known to have. That also explained the reason why my OS was corrupt. For those who install aftermarket SSD drives on a Macbook Pro 2012 which originally comes with a HDD, make sure to enable TRIM to avoid this happening to you.