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prohibited

  1. Sickminecraft45

    Power Mac G5 help!

    Hi, I need help with my Power Mac G5! I tried to make a bootable USB for Leopard but when I go into the boot selector, the drive doesn't come up, when I try to launch the installer from Mac OS X, it just reboots into the OS, and when I try to boot into it from open firmware, it just shows the...
    • Sickminecraft45
    • Thread
    • 10.5 leopard mac os x open firmware power mac g5 prohibited prohibited sign sign usb usb boot
    • Replies: 16
    • Forum: PowerPC Macs
  2. S

    Mid 2012 MBP Died. Can't reinstall OS. Help. :(

    This is my very last ditch effort to revive my Macbook Pro. I don't want to waste anyone's time on here, so I made sure to exhaust every other option available to me via online tutorial videos, and other forum posts. I have tried everything I can think of. I was working as usual on my MBP last...
    • steveyraff
    • Thread
    • 2012 dead macbook pro mbp mid-2012 mojave prohibited prohibited symbol
    • Replies: 5
    • Forum: MacBook Pro
  3. Maurício Esquiavoi

    MacBook Pro prohibited

    Hi there, I have one MacBook Pro mid 2010, first owner, last year it was upgraded, 500 ssd and 16ddr3. I don’t understand what happened, last week I was working and went to make some lunch and when I back the monitor was grey and prohibited. I read here in the forum, videos on YouTube how to...
  4. 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...
    • syntholog
    • Thread
    • cable external boot drive imac prohibited prohibition symbol prohibitory sign prohibitory symbol ssd upgrade
    • Replies: 2
    • Forum: iMac
  5. x13gamer

    2012 Mini boots fine sometimes... Prohibited symbol others

    A 2012 Mac Mini that I have owned since October recently booted with the prohibited symbol. I have tried reinstalling the original software and have tried restoring using recovery mode and it will work for some time and then go back to the same issue a few days later. I ran ETRECheck and got...
    • x13gamer
    • Thread
    • fushion drive mac mini 2012 prohibited
    • Replies: 6
    • Forum: Mac mini
  6. angelbur

    Macbook pro 2011 "prohibited symbol"

    To start off I've gone and read all about prohibited "do not enter" symbol problems around. Here's whats different that doesn't seem to work for me. Macbook pro 2011 15 inch - I don't get a apple logo at the start, just right to the symbol after 10-15seconds - touched harddrive as it booted but...
    • angelbur
    • Thread
    • bootup cannot do not enter prohibited start up symbol turn on
    • Replies: 4
    • Forum: MacBook Pro
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