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prohibition symbol

  1. K

    Macbook Pro A1398 Getting stuck at Prohibition screen on executing Internet Recovery

    Hi, I have an A1398 MBP, which was working fine until last couple of days. I will list the series of events that occurred:- 1. It suddenly started booting in safe mode. 2. Did not accept the password. 3. There was a left shift key issue seems to be. 4. Used the Right shift to key in the...
  2. S

    Prohibitory symbol on boot with new Samsung 860 Evo SSD in 21.5" iMac Mid 2011

    Hello all, I recently bought a 500 GB Samsung 860 EVO 2.5” form factor SSD to swap it out with the primary HDD in a mid 2011 21.5” iMac. Problem is, the computer doesn’t boot (shows a prohibitory sign) whenever the 860 is inside the chassis and connected to the motherboard through SATA, however...
  3. Pannonia

    Macintosh HD password problem

    Hi, I hope someone can please kindly help me. I updated my 2014 Macbook Air to Mojave recently. I used it for a few minutes, after that I shut it down, went on holidays and a week later when started it up again I got the prohibition symbol. I tried reinstalling OS trough internet recovery, (...