How to Fix Prohibitory Sign on Mac Startup

Mac operating system is the world’s most advanced and the most reliable operating system. You can complete many of your personal or professional tasks with the help of this operating system. Though it is a very reliable OS, but you can find many errors in this time to time. Sometimes it happens that when you try to start the Mac, you may get a prohibitory sign on Mac startup. This is a very critical error that comes with a question marks or Apple logo or with a complete black or grey screen of death error. Without troubleshooting this error, you will not be able to access the computer properly. So, go through the manual method given in this article or you can also download MacKeeper Tool that will help you getting rid of the error automatically.


Download MacKeeper Software To Fix Mac Error – 100% Tested and Virus Free Tool

Causes of prohibitory sign on Mac startup –

There are many causes or reasons responsible for the occurring of this error like incomplete installation of the Mac operating system, installing the Mac with a damaged disk, conflicts among the applications of the Mac, bad boot sector, corruption in the Mac file system, improper installing or uninstalling some applications from the Mac, improper maintenance of the computer, installing the applications from an unknown source, etc.

How to fix prohibitory sign on Mac startup –

Go through the following manual method to fix the issue manually:

  1. First of all you should try to restart your Mac computer.
  2. Reset the PRAM of the Mac.
  3. Repair the disk with an OS X installation DVD.
  4. Replace or remove the Mach_kernel file.
  5. If you have Time Machine backup then you should restore the system at once.

With the help of the above manual method, you will be able to get rid of the prohibitory sign on Mac startup problem properly. But if the error is still in your computer, then you must download and install MacKeeper Tool to fix the issue automatically.


Download MacKeeper Software To Fix Mac Error – 100% Tested and Virus Free Tool

MacKeeper Tool is one of the best tools in the world that will rectify the entire Mac problems automatically. It is an automatic tool that scans the whole computer first and find out the causes responsible for the errors and remove them completely. It will also improve the computer performance incredibly.


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