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What does a prohibitory symbol on a MacBook Pro mean?
A prohibitory symbol, which looks like a circle with a line or slash through it, means that your startup disk contains a Mac operating system, but it’s not a version or build of macOS that your Mac can use. Press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off.
What to do if your Mac starts up to the Apple logo?
If the issue persists, once again press and hold the power button until your Mac turns off. Then use Disk Utility to repair your startup disk. If Disk Utility found no errors, reinstall macOS. If Disk Utility found errors and repaired them, restart your Mac.
What to do when your MacBook Pro wont turn on?
Press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off. Then turn your Mac back on. If the issue persists, press and hold the power button until your Mac turns off. Then unplug all accessories from your Mac, including printers, drives, USB hubs, and other nonessential devices.
What does the lock icon on my MacBook Pro mean?
Lock icon. If your Mac is using a firmware password, the lock icon appears when you try to start up from another disk or volume, such as an external drive or macOS Recovery. Enter the firmware password to continue.
How do I get rid of the lock icon on my Mac?
Insert it and go to Mac installer, under Disk Utilities to the drop down menu. Then go to about the fourth one down marked Firmware Password. When you do, it just turn off the password portion of it and you won’t need to enter any password the next time you install or reboot from your DVD/CD disc.
Why is my keyboard not working on my MacBook Pro?
You have to make sure you press these keys before the gray screen appears or it won’t work. Hold those keys down until your Mac reboots again and you hear the startup chime for the second time. Once you’ve reset the NVRAM, power off and try the various Recovery Mode keyboard shortcuts again.
Why does my iMac have a padlock icon?
On the IMac Desktop 27inch it has no CD Slot when I start it shows the padlock icon so how can you reset the Pram all I have now is 24 reference number. Which I got following a tutorial on YouTube am stuck now