Macbook No Entry Sign On Boot

Mac os x has several bootup symbols including a universal prohibitory sign that indicates critical files are missing from the boot volume.
Macbook no entry sign on boot. Seeing a no entry sign after a new crucial m500 installation i just installed a new crucial m500 drive into my 2009 2 0 ghz mac mini. But i keep seeing the no entry icon. Thanks for the a2a. Managing a prohibitory sign at os x bootup.
Macbook pro 13 retina display late 2013. Either the system on the hard drive has been corrupted and it can t boot from it or the hard drive itself is damaged. Model a1502 2 4 2 6 or 2 8 ghz dual core intel processor released october 2013. You don t say how old your macbook pro is so that could also be a factor.
When starting your mac if you run into a prohibitory sign and the system will not boot there are a couple of things you can try to address the problem. How to fix no entry sign on mac factory reset. 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. 29 2010 10 33 a m.