I have a problem and it is difficult to tell me what to do next.
I did everything according to the instructions:
I have a MaBook Pro 15 (Mid2014), Intel Core i7, 16 GB RAM.
I downloaded the system, prepared a flash drive, uploaded to the flash drive.
I removed the older system, installed the new system until an error
https://support.apple.com/en-us/HT210901 popped up.
Booting with the option button does not work, via command+R I can fire up with additional options (Reinstall, Disk Utility).
I stopped being able to (or I don't know where) I can make another attempt to install from a flash drive (I tried 2 times before and it was possible with Start+Option to enter the disk and select installation.
I can install OS X Yosemite by connecting to the internet and I will be back to square one. What could I have skipped?