Hello,
My dad installed Windows 10 on my mac using boot camp as I understood. When I try to log in to Macos or see if it is there it seems to be gone when I turn the computer on, there is only option to choose Windows, when I select option of restarting the in Macos it says that it 'Could not allocate the OS X boot volume'. This happened before, and my dad was able to fix, but his brain tumor progressed so far that he is as functional as a 3 year old, and has no idea what I am talking about or what to do with computer. I know nothing about computers, which sucks, I do not even need the Macos system, but I really need that memory, or at least most of the memory that was dedicated to Macos. It looks like a common problem, but I can't seem to follow the instructions people posted. I hope someone here can help, I have no money to pay tech services