MacBook Pro with Retina display, OS X Yosemite. On the start up my MacBook Pro is showing a circle with a line inside which is prohibitory sign. It goes no further. Tried but the Disk Utility. Stuck with my OS X Utilities for couple of days. I tried the Disk Utility. Finding the way out.
I tried to do an Internet Recovery. Then I came to a window for install OS X. My current version is OS X Yosemite. I click to continue. It varieties computers eligibility, then I click agree to go forward. Next, it says select the disc where you want to install OS X. It won't let me install. What's that mean? Where is the problem? What to do?