How to fix prohibitory sign on Mac OS X is one search term which is being frequently hit by number of Mac users. There are various startup warning which can be encountered by users on Mac boot time. Universal prohibitory sign is one of them which indicated that there is something wrong with Mac OS X bootable installation, either any crucial boot element is missing or problem found in the setting of hardware of software. In such situation there arises the question how to fix prohibitory sign on Mac?
Most of the time this very irritating boot problem is appears on Mac screen when there is multiple OS X bootable installation. No matter what the reason behind it but it is very critical issue for any Mac users. Well, in case if you are also facing the same issue and want to know how to fix prohibitory sign on Mac, then you are at the right place. In order to fix this issue you will need to reinstall the OS on your Mac. Once the prohibitory sign on Mac is get resolves completely then you can recover all your precious files with using Mac Data Recovery Software.